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Free and open-source software (FOSS) issoftware available under alicense that gives users the right to use, share, modify, and distribute the software – modified or not – to everyone and provides the means to exercise those rights using the software's source code. FOSS is an inclusiveumbrella term encompassingfree software andopen-source software. The rights guaranteed by FOSS originate from the "Four Essential Freedoms" ofThe Free Software Definition and the criteria ofThe Open Source Definition. All FOSS has publicly availablesource code, but not allsource-available software is FOSS. FOSS is the opposite ofproprietary software, which is licensed restrictively or has undisclosed source code.

The historical precursor to FOSS was the hobbyist and academicpublic domain software ecosystem of the 1960s to 1980s. Free and open-source operating systems such asLinux distributions and descendants ofBSD are widely used, powering millions ofservers,desktops,smartphones, and other devices.Free-software licenses andopen-source licenses have been adopted bymany software packages. Reasons for using FOSS include decreased software costs, increasedsecurity againstmalware, stability,privacy, opportunities for educational usage, and giving users more control over their own hardware.

Thefree software movement and theopen-source software movement areonline social movements behind widespread production, adoption and promotion of FOSS, with the former preferring to use the equivalent termfree/libre and open-source software. FOSS is supported by a loosely associated movement of multiple organizations, foundations, communities and individuals who share basic philosophical perspectives and collaborate practically, but may diverge in detail questions. (More about free and open-source software...)

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Image 1

Davis some time after 1985

Terrence Andrew Davis (December 15, 1969 – August 11, 2018) was an American electrical engineer, computer programmer, andoutsider artist best known for creating and designingTempleOS, apublic domain operating system. In 1996, Davis began experiencing regularmanic episodes, some of which led to hospitalization. Initially diagnosed withbipolar disorder, he was later declared to haveschizophrenia. Eight months before his death, he struggled with periods of homelessness. His fans brought him supplies, but Davis refused their offers of housing. In August 2018, he was struck by a train and died at the age of 48. (Full article...)
Image 2

Screenshot of Debian 13 (Trixie) with theGNOME desktop environment version 48.3

Debian (/ˈdɛbiən/) is aLinux distribution developed by the Debian Project, established byIan Murdock in August 1993.

Debian is developed openly by a team of volunteers guided by theDebian Project Leader and three foundation documents: theDebian Social Contract, the Debian Constitution, and theDebian Free Software Guidelines.

As of January 2026, the Debian community has over 1,400 active contributors, who maintain, document, and support more than 94,000 free packages.

TheFree Software Foundation sponsored the project from November 1994 to November 1995, ending their sponsorship over technical disagreements and Debian's inclusion of optional non-free software and firmware repositories. In response, members of the Debian Project founded the non-profit organizationSoftware in the Public Interest in 1997 to enable the project to accept donations and provide legal backing for its trademarks.

Debian is the second-oldest Linux distribution still in active development; onlySlackware is older. Debian forms the basis ofmany other Linux distributions. (Full article...)
Image 3

rio, default user interface of Plan 9 from Bell Labs

Plan 9 from Bell Labs is anoperating system designed by the Computing Science Research Center (CSRC) atBell Labs in the mid-1980s, built on theUNIX concepts first developed there in the late 1960s. Since 2000, Plan 9 has beenfree and open-source. The final official release was in early 2015.

Under Plan 9, UNIX'severything is a file metaphor is extended via a pervasive network-centric (distributed) filesystem, and thecursor-addressed,terminal-basedI/O at the heart ofUNIX is replaced by awindowing system andgraphical user interface without cursor addressing (althoughrc, the Plan 9shell, is text-based). Plan 9 also introducedcapability-based security and alog-structured file system calledFossil that providessnapshotting and versioned file histories.

The namePlan 9 from Bell Labs is a reference to theEd Wood 1957cult science fiction Z-moviePlan 9 from Outer Space. The system continues to be used and developed by operating system researchers and hobbyists. (Full article...)
Image 4
The Ur-Quan Masters is a 2002 open-sourcefangame modification, based on theaction-adventure science fiction gameStar Control II. The original game was released for PCs in 1992 and ported to the3DO console in 1994. It has been frequently mentioned among thebest games of all time, with additional praise for its writing, world design, character design, and music.

After theStar Control II copyrights reverted to creatorsPaul Reiche III andFred Ford, they licensed their content to their fan community under theGNU General Public License, to keep their series in the public eye. The open-source development team remade the 3DO version as a port to modern operating systems, and allowed fan-mademodifications to add improvements absent in the original release. Released under the titleThe Ur-Quan Masters (thesubtitle of the original game), the modified remake has since been downloaded nearly two million times, earning critical reception as one of the best free games available, with additional praise for a high-definition graphics fan modification. (Full article...)
Image 5
Tux Racer is a 2000open-source winter sports racing video game starring theLinux mascot,Tux the penguin. It was originally developed by Jasmin Patry as a computer graphics project at theUniversity of Waterloo. Later on, Patry and the newly founded Sunspire Studios, composed of several former students of the university, expanded it. In the game, the player controls Tux as he slides down a course of snow and ice collectingherrings.

Tux Racer was officially downloaded over one million times as of 2001. It also was well received, often being acclaimed for the graphics, fast-paced gameplay, and replayability, and was a fan favorite among Linux users and the free software community. The game's popularity secured the development of a proprietized release that included enhanced graphics and multiplayer, and it also became the firstGPL-licensed game to receive anarcade adaptation. It is the only product that Sunspire Studios developed and released, after which the company liquidated. (Full article...)
Image 6
Popular open source licenses include theApache License, theMIT License, theGNU General Public License (GPL), theBSD Licenses, theGNU Lesser General Public License (LGPL) and theMozilla Public License (MPL).

Open-source licenses aresoftware licenses that allow content to be used, modified, and shared. They facilitatefree and open-source software (FOSS) development.Intellectual property (IP) laws restrict the modification and sharing of creative works. Free and open-source licenses use these existing legal structures for an inverse purpose. Theygrant the recipient the rights to use the software, examine thesource code, modify it, and distribute the modifications. These criteria are outlined in theOpen Source Definition.

After 1980, the United States began to treat software as a literary work covered by copyright law.Richard Stallman founded thefree software movement in response to the rise ofproprietary software. The term "open source" was used by theOpen Source Initiative (OSI), founded by free-software developersBruce Perens andEric S. Raymond. "Open source" emphasizes the strengths of theopen development model rather than software freedoms. While the goals behind the terms are different, open-source licenses andfree-software licenses describe the same type of licenses.

The two main categories of open-source licenses arepermissive andcopyleft. Both grant permission to change and distribute software. Typically, they requireattribution anddisclaim liability. Permissive licenses come from academia. Copyleft licenses come from the free software movement. Copyleft licenses requirederivative works to be distributed with the source code and under a similar license. Since the mid-2000s, courts in multiple countries have upheld the terms of both types of license. Software developers have filed cases as copyright infringement and as breaches of contract. (Full article...)
Image 7

Brave is afree and open-source web browser which was first released in 2016. It is developed by US-basedBrave Software, Inc. and based on theChromium web browser. Brave is marketed as a privacy-focused web browser and includes features such as built-inadvertisement blocking, protections againstbrowser fingerprinting and a private browsing mode that integrates theTor anonymity network. Brave also incorporates its own advertising through a rewards system based oncryptocurrency, which allows users to earn Basic Attention Tokens (BAT) by opting-in to view ads served through its ad network. While Brave has been praised for its privacy protections and features, it has faced criticism over early plans to replace publisher's ads with its own and missteps surrounding its handling ofaffiliate links and privacy vulnerabilities in its private browsing mode. (Full article...)
Image 8

Newest logo of GNOME Web since version 40

GNOME Web, calledEpiphany until 2012 and still known by thatcode name, is afree and open-source web browser based on theGTK port ofApple'sWebKit rendering engine, calledWebKitGTK. It is developed bythe GNOME project forUnix-like systems. It is the default and official web browser ofGNOME, and part of theGNOME Core Applications.

GNOME Web is the default web browser onelementary OS,Bodhi Linux version 5 andPureOS GNOME Edition. (Full article...)
Image 9
Rust is ageneral-purpose programming language. It is noted for its emphasis onperformance,type safety,concurrency, andmemory safety.

Rust supports multipleprogramming paradigms. It was influenced by ideas fromfunctional programming, includingimmutability,higher-order functions,algebraic data types, andpattern matching. It also supportsobject-oriented programming via structs,enums, traits, and methods. Rust is noted for enforcing memory safety (i.e., that allreferences point to valid memory) without a conventionalgarbage collector; instead, memory safety errors anddata races are prevented by the "borrow checker", which tracks theobject lifetime of referencesat compile time.

Software developer Graydon Hoare created Rust in 2006 while working atMozilla, which officially sponsored the project in 2009. The first stable release, Rust 1.0, was published in May 2015. Following a layoff of Mozilla employees in August 2020, four other companies joined Mozilla in sponsoring Rust through the creation of theRust Foundation in February 2021.

Rust has been adopted by many software projects, especiallyweb services andsystem software. It has been studied academically and has a growing community of developers. (Full article...)
Image 10
DragonFly BSD is afree and open-source Unix-like operating system forked fromFreeBSD 4.8.Matthew Dillon, anAmiga developer in the late 1980s and early 1990s and FreeBSD developer between 1994 and 2003, began working on DragonFly BSD in June 2003 and announced it on the FreeBSD mailing lists on 16 July 2003.

Dillon started DragonFly in the belief that the techniques adopted forthreading andsymmetric multiprocessing in FreeBSD 5 would lead to poor performance and maintenance problems. He sought to correct these anticipated problems within the FreeBSD project. Due to conflicts with other FreeBSD developers over the implementation of his ideas, his ability to directly change thecodebase was eventually revoked. Despite this, the DragonFly BSD and FreeBSD projects still work together, sharing bug fixes, driver updates, and other improvements. Dillon named the project after photographing a dragonfly in his yard, while he was still working on FreeBSD.

Intended as the logical continuation of the FreeBSD 4.x series, DragonFly has diverged significantly from FreeBSD, implementinglightweight kernel threads (LWKT), an in-kernelmessage passing system, and theHAMMER file system. Many design concepts were influenced byAmigaOS. (Full article...)
Image 11

Pocket Casts is apodcast streaming service originally launched in 2011 foriOS andAndroid. The app allows for searching, downloading and subscribing to podcasts and syncs across devices. Pocket Casts was developed by Russell Ivanovic and Philip Simpson under the Australian independent development team Shifty Jelly. In 2018, the app was acquired by a group of public radio organisations includingNational Public Radio before being sold toWordPress.com ownerAutomattic in 2021.

With initial development efforts focusing on Android, Pocket Casts for iOS and Android was madefree and open source in 2022 and received its latest major release 8.0 in 2025. It was also launched for the web,macOS, andWindows, and integrated to car head units, smart speakers, and smartwatch operating systems. Initially requiring a one-time fee, Pocket Casts switched to afreemium model in 2019, adding a subscription plan with more features. Commentators have directed praise to the array of features and the interface's simplicity. In 2020, a request by theCyberspace Administration of China led to the removal of Pocket Casts from Apple's App Store in China. (Full article...)
Image 12

Dolphin is afree and open-source video game console emulator of theGameCube,Wii andTriforce arcade system that runs onWindows,Linux,macOS, andAndroid.

It had itsinaugural release in 2003 asfreeware for Windows. Dolphin was the first GameCube emulator that could successfully run commercial games. After troubled development in the first years, Dolphin becamefree and open-source software and subsequently gained support for Wii emulation. Soon after, the emulator was ported to Linux and macOS. As mobile hardware became more powerful over the years,running Dolphin on Android became a viable option.

Dolphin has been well received in the IT and video gaming media for its high compatibility, steady development progress, the number ofavailable features, and the ability to play games withgraphical improvements over the original platforms. (Full article...)
Image 13

DOSBox icon

DOSBox is afree and open-source MS-DOS emulator. It supports runningprograms – primarilyvideo games – that are otherwise inaccessible sincehardware for running a compatibledisk operating system (DOS) is obsolete and generally unavailable today. It was first released in 2002, when DOS technology was becoming obsolete. Its adoption for running DOS games is relatively widespread, partly because of its use in commercial re-releases of games. (Full article...)
Image 14

Leafpad is afree and open-source graphicaltext editor forLinux,Berkeley Software Distribution (BSD), andMaemo that is similar to theMicrosoft Windows programNotepad. Created with the focus of being a lightweight text editor with minimaldependencies, it is designed to be simple-to-use and easy-to-compile.

Leafpad has a small install size compared to other graphical text editors and has minimal features such ascodeset options,undo/redo, and the ability to choose fonts. Leafpad is the default text editor for theLXDE lightweightdesktop environment, and thus Leafpad is found onLinux distributions that use LXDE as their desktop environment such asRaspberry Pi OS, as well as on some embedded systems. The program has beenforked intoMousepad and l3afpad, and parts of Leafpad's code have been used in other text editors. Leafpad is released under theGNU General Public License (GPL) version 2. (Full article...)

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Terminology

Alternative terms for free software, such asOSS,FOSS, andFLOSS, have been a recurring issue among free and open-source software users from the late 1990s onwards. These terms share almost identicallicence criteria anddevelopment practices.

In 1983Richard Stallman launched thefree software movement and founded theFree Software Foundation to promote the movement and to publish its owndefinition. Others have published alternative definitions offree software, notably theDebian Free Software Guidelines. In 1998,Bruce Perens andEric S. Raymond began a campaign to marketopen-source software and founded theOpen Source Initiative, which espoused different goals and a different philosophy from Stallman's. (Full article...)

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Popular pages

Period: 2026-01-01 to 2026-01-31

Total views: 9,437,028

Updated: 20:20, 6 February 2026 (UTC)

Rank	Page title	Views	Daily average	Assessment	Importance
1	Nginx	196,093	6,325	B	Mid
2	Python (programming language)	141,237	4,556	B	High
3	Android (operating system)	130,995	4,225	B	Top
4	Bitcoin	130,309	4,203	B	Low
5	Linux	114,526	3,694	B	Top
6	Firefox	109,883	3,544	B	Top
7	Truth Social	103,422	3,336	B	Low
8	GitHub	103,338	3,333	B	High
9	Android version history	93,644	3,020	List	High
10	DeepSeek	90,684	2,925	B	High
11	Linus Torvalds	90,668	2,924	B	Top
12	Tor (network)	81,652	2,633	B	High
13	Tim Berners-Lee	77,707	2,506	C	Mid
14	Terry A. Davis	76,715	2,474	GA	Low
15	Bluesky	63,815	2,058	B	Mid
16	Rust (programming language)	61,582	1,986	GA	Unknown
17	Go (programming language)	60,303	1,945	B	Mid
18	R (programming language)	60,032	1,936	B	High
19	List of Linux distributions	59,763	1,927	List	Mid
20	Ubuntu	59,543	1,920	B	Top
21	TempleOS	57,698	1,861	B	Mid
22	Signal (software)	57,508	1,855	C	Top
23	VLC media player	48,271	1,557	C	High
24	Brave (web browser)	48,209	1,555	GA	Low
25	Debian	46,855	1,511	GA	High
26	Vim (text editor)	45,752	1,475	B	High
27	Git	45,682	1,473	B	Mid
28	History of bitcoin	43,511	1,403	B	Low
29	Bell Labs	42,694	1,377	B	High
30	LibreOffice	41,173	1,328	C	Top
31	MIT License	41,119	1,326	C	Mid
32	Linux kernel	40,189	1,296	B	Top
33	Free content	39,681	1,280	C	High
34	Visual Studio Code	38,691	1,248	C	Mid
35	UBlock Origin	38,388	1,238	C	High
36	LaTeX	38,139	1,230	B	High
37	Arch Linux	36,913	1,190	B	Mid
38	Proton Mail	36,743	1,185	C	Mid
39	Open source	35,499	1,145	B	Top
40	Copyright	35,290	1,138	C	Top
41	Free and open-source software	34,764	1,121	C	Top
42	Ubuntu version history	31,210	1,006	List	Mid
43	Fedora Linux	31,039	1,001	B	High
44	Chromium (web browser)	30,271	976	B	High
45	Docker (software)	30,265	976	C	Mid
46	Blender (software)	30,263	976	C	High
47	Bash (Unix shell)	29,347	946	B	High
48	Elasticsearch	28,436	917	C	Low
49	OpenClaw	28,368	915	C	Low
50	MySQL	28,289	912	C	High
51	Node.js	28,278	912	C	Mid
52	PostgreSQL	28,205	909	C	High
53	GNU General Public License	27,570	889	B	Top
54	Linux kernel version history	26,237	846	List	Mid
55	Richard Stallman	26,163	843	B	Top
56	RISC-V	25,952	837	C	Mid
57	PHP	25,368	818	C	High
58	Lua	24,245	782	C	Mid
59	Zorin OS	24,244	782	Start	Low
60	Notepad++	24,018	774	Start	High
61	Mastodon (social network)	23,674	763	C	High
62	GrapheneOS	23,611	761	B	High
63	Xfce	23,454	756	B	Mid
64	Guido van Rossum	23,406	755	C	Mid
65	FreeBSD	23,180	747	B	High
66	Inkscape	21,998	709	C	Mid
67	Stockfish (chess)	21,967	708	B	Low
68	Open-source software	21,820	703	C	Top
69	FFmpeg	21,785	702	C	Mid
70	MongoDB	21,488	693	C	High
71	Wayland (protocol)	21,483	693	C	High
72	Patent	21,460	692	B	Low
73	React (software)	21,409	690	B	Mid
74	MediaWiki	21,315	687	C	High
75	Dogecoin	21,135	681	C	Low
76	GNOME	20,812	671	B	High
77	VirtualBox	20,415	658	C	Mid
78	Proprietary software	20,154	650	C	High
79	F-Droid	20,000	645	Start	Mid
80	X Window System	19,893	641	C	Mid
81	Perl	19,439	627	C	High
82	.NET	19,431	626	C	Low
83	Copyleft	19,234	620	C	High
84	Plan 9 from Bell Labs	19,179	618	GA	Low
85	Red Hat	19,147	617	C	High
86	OpenStreetMap	18,968	611	B	Mid
87	LineageOS	18,956	611	C	High
88	NixOS	18,888	609	C	Low
89	GNU	18,795	606	C	Top
90	Mozilla	18,721	603	B	Top
91	GIMP	18,509	597	B	Top
92	Free software	18,300	590	C	Top
93	Qt (software)	17,947	578	C	Mid
94	OBS Studio	17,932	578	Start	Low
95	Lichess	17,912	577	C	Mid
96	LLVM	17,869	576	C	Mid
97	Donald Knuth	17,826	575	B	High
98	Signal Foundation	17,521	565	Start	Mid
99	KDE	17,369	560	B	High
100	XRP Ledger	17,246	556	C	Mid
101	Systemd	17,240	556	C	High
102	WebP	17,232	555	C	Low
103	OpenGL	17,080	550	C	High
104	7-Zip	16,986	547	B	Low
105	AV1	16,965	547	B	Low
106	Proton VPN	16,925	545	Start	Low
107	Digital rights management	16,712	539	C	High
108	TensorFlow	16,649	537	C	High
109	Audacity (audio editor)	16,230	523	C	Mid
110	Zig (programming language)	15,925	513	C	Low
111	PyTorch	15,919	513	C	Low
112	Emacs	15,905	513	B	High
113	Bypass Paywalls Clean	15,883	512	Stub	Unknown
114	Berkeley Software Distribution	15,733	507	B	High
115	Darwin (operating system)	15,641	504	B	Mid
116	GNU Compiler Collection	15,551	501	B	High
117	KDE Plasma	15,361	495	C	Mid
118	LibreWolf	15,253	492	Start	Unknown
119	WebKit	15,053	485	B	Mid
120	ReactOS	14,815	477	B	Mid
121	Brendan Eich	14,765	476	C	Low
122	Tailscale	14,749	475	C	Low
123	Mullvad	14,743	475	Start	Low
124	Cinnamon (desktop environment)	14,719	474	Start	Low
125	Swift (programming language)	14,687	473	B	Low
126	Wine (software)	14,589	470	C	High
127	Windows Subsystem for Linux	14,259	459	C	High
128	Psiphon	14,089	454	B	Low
129	Redis	13,883	447	C	Low
130	PuTTY	13,657	440	C	Mid
131	Flutter (software)	13,635	439	C	Low
132	TeX	13,538	436	B	Mid
133	WireGuard	13,430	433	C	Mid
134	History of Python	13,396	432	C	Mid
135	Krita	13,307	429	C	High
136	Ruby (programming language)	13,246	427	B	High
137	COSMIC desktop	13,206	426	C	Unknown
138	Tails (operating system)	13,184	425	Start	High
139	Raspberry Pi OS	13,180	425	C	High
140	Android 13	13,145	424	C	Unknown
141	QBittorrent	13,039	420	Start	Low
142	SQLite	12,983	418	B	Mid
143	Nextcloud	12,945	417	C	High
144	List of free and open-source software packages	12,828	413	List	High
145	OpenWrt	12,774	412	C	Low
146	Hackathon	12,640	407	C	Mid
147	OpenOffice.org	12,610	406	B	Mid
148	Apache Kafka	12,605	406	Start	Low
149	Lean (proof assistant)	12,548	404	C	Low
150	OnlyOffice	12,538	404	Start	Low
151	OpenVPN	12,383	399	C	Mid
152	Canonical (company)	12,380	399	Start	High
153	CyanogenMod	12,377	399	C	Mid
154	Gab (social network)	12,368	398	C	Mid
155	Android 14	12,214	394	C	Unknown
156	BSD licenses	12,175	392	C	Top
157	Server Message Block	12,132	391	C	Low
158	JPEG XL	11,900	383	B	Low
159	Btrfs	11,868	382	C	Low
160	Wireshark	11,854	382	C	Mid
161	Tuta (email)	11,785	380	Start	Mid
162	List of open-source video games	11,771	379	List	Mid
163	Manjaro	11,744	378	Start	Low
164	OpenDocument	11,597	374	B	Mid
165	Gzip	11,519	371	Start	Low
166	Gentoo Linux	11,518	371	B	High
167	High Efficiency Image File Format	11,416	368	C	Unknown
168	Angular (web framework)	11,410	368	Start	Mid
169	Kubuntu	11,357	366	Start	Mid
170	FLAC	11,261	363	C	Mid
171	Mozilla Thunderbird	11,241	362	C	High
172	Apache Spark	11,152	359	B	Low
173	Opus (audio format)	11,140	359	B	Mid
174	XGBoost	10,856	350	C	Unknown
175	AWStats	10,771	347	Start	Low
176	Grep	10,746	346	C	High
177	XZ Utils backdoor	10,587	341	B	High
178	Moodle	10,573	341	C	Low
179	Ruby on Rails	10,570	340	C	Low
180	PeerTube	10,486	338	C	Mid
181	APT (software)	10,458	337	C	High
182	Clang	10,433	336	C	Mid
183	Kiwix	10,405	335	C	Low
184	OpenBSD	10,375	334	B	High
185	Android 12	10,369	334	C	Mid
186	Ouya	10,348	333	C	Low
187	Apache License	10,321	332	C	High
188	Linux Foundation	10,296	332	B	Top
189	BusyBox	10,233	330	Start	Low
190	MariaDB	10,167	327	C	Low
191	Flatpak	10,122	326	Start	Mid
192	Embrace, extend, and extinguish	10,103	325	C	Mid
193	WebOS	9,886	318	B	Low
194	Chmod	9,858	318	B	Mid
195	Npm	9,783	315	C	Low
196	Kodi (software)	9,778	315	C	Low
197	Haiku (operating system)	9,747	314	C	Mid
198	Android 10	9,711	313	C	Mid
199	Erlang (programming language)	9,704	313	B	Mid
200	Xubuntu	9,656	311	C	Low
201	Vi (text editor)	9,500	306	C	Mid
202	AlmaLinux	9,465	305	C	Low
203	D (programming language)	9,371	302	C	Low
204	SourceForge	9,361	301	C	High
205	Popcorn Time	9,351	301	C	Mid
206	Project Jupyter	9,329	300	C	Mid
207	WebM	9,294	299	C	Mid
208	QEMU	9,285	299	C	Low
209	Firefox version history	9,280	299	List	High
210	Comparison of Linux distributions	9,256	298	B	High
211	I2P	9,214	297	B	Low
212	Lubuntu	9,206	296	C	Low
213	Sudo	9,176	296	B	Mid
214	Matrix (protocol)	9,171	295	B	High
215	OpenJDK	9,140	294	C	High
216	MicroG	9,120	294	C	Mid
217	KeePass	9,058	292	C	Mid
218	GNU Project	8,968	289	B	Top
219	Android Lollipop	8,935	288	C	Low
220	Minix	8,926	287	C	Mid
221	Bcrypt	8,915	287	C	Mid
222	Budgie (desktop environment)	8,875	286	Start	Low
223	GRPC	8,796	283	Start	Low
224	Rocky Linux	8,761	282	C	Low
225	Sailfish OS	8,710	280	C	Low
226	OpenSSL	8,674	279	B	Mid
227	History of Linux	8,659	279	C	High
228	Apache HTTP Server	8,640	278	B	Mid
229	Knoppix	8,600	277	Start	High
230	TrueNAS	8,594	277	C	Low
231	SOAP	8,547	275	C	Low
232	InterPlanetary File System	8,531	275	C	Low
233	Xvid	8,525	275	C	Low
234	Android 11	8,510	274	C	Mid
235	Tar (computing)	8,504	274	C	Mid
236	Gecko (software)	8,436	272	C	High
237	ActivityPub	8,434	272	C	Mid
238	Youtube-dl	8,407	271	Start	High
239	Vorbis	8,392	270	B	High
240	Nmap	8,386	270	C	Mid
241	Django (web framework)	8,370	270	C	Mid
242	Man page	8,352	269	C	High
243	Comparison of operating systems	8,344	269	List	Mid
244	Ping (networking utility)	8,300	267	C	Mid
245	SeaMonkey	8,241	265	B	Low
246	Android Marshmallow	8,240	265	C	Low
247	GTK	8,206	264	C	High
248	Apache Parquet	8,194	264	C	Low
249	AVIF	8,158	263	C	Low
250	Adobe Flash Player	8,120	261	C	Low
251	Free Software Foundation	8,116	261	C	High
252	IntelliJ IDEA	8,058	259	Start	Low
253	Drupal	8,043	259	B	High
254	Sed	8,042	259	C	Low
255	Electron (software framework)	8,042	259	C	Mid
256	Ncurses	8,028	258	C	Low
257	Laravel	8,004	258	C	Low
258	Android Pie	8,002	258	C	Mid
259	WebRTC	8,000	258	C	High
260	Lawrence Lessig	7,988	257	B	Low
261	Android Oreo	7,939	256	C	Mid
262	Comparison of BitTorrent clients	7,867	253	List	Unknown
263	Ext4	7,849	253	C	High
264	Kernel-based Virtual Machine	7,814	252	C	Mid
265	List of custom Android distributions	7,745	249	List	Mid
266	Supermium	7,728	249	Start	Unknown
267	Low Orbit Ion Cannon	7,711	248	Start	Mid
268	Lynx (web browser)	7,697	248	Start	Low
269	LAMP (software bundle)	7,622	245	C	High
270	Blink (browser engine)	7,619	245	C	Mid
271	Benevolent dictator for life	7,595	245	Start	Low
272	GNU Hurd	7,592	244	C	Mid
273	Litecoin	7,565	244	Start	Low
274	AutoHotkey	7,544	243	Start	Low
275	Kdenlive	7,444	240	Start	High
276	Bootstrap (front-end framework)	7,437	239	Start	Low
277	Selenium (software)	7,434	239	B	Mid
278	GNU Lesser General Public License	7,409	239	C	High
279	GNU Affero General Public License	7,398	238	C	High
280	Privacy Badger	7,389	238	Start	Mid
281	OpenSolaris	7,375	237	B	Low
282	Eclipse (software)	7,365	237	B	Mid
283	Hyphanet	7,362	237	B	Low
284	GNU Core Utilities	7,303	235	Start	Low
285	Xen	7,287	235	C	High
286	OpenTTD	7,278	234	C	Low
287	React Native	7,261	234	C	Low
288	HandBrake	7,244	233	Start	Low
289	KiCad	7,210	232	C	Low
290	TOML	7,207	232	Start	Low
291	Zotero	7,188	231	C	Low
292	Pi-hole	7,169	231	C	Low
293	Dolphin (emulator)	7,166	231	GA	Low
294	List of copyright duration by country	7,134	230	List	Low
295	GNU Free Documentation License	7,077	228	C	High
296	Qubes OS	7,073	228	C	Low
297	GitLab Inc.	7,063	227	C	Low
298	Android Nougat	7,043	227	C	Mid
299	Artix Linux	7,034	226	Start	Low
300	KDE Gear	7,025	226	Start	Mid
301	PipeWire	7,020	226	Start	Low
302	Ryan Dahl	7,006	226	Start	Low
303	Zstd	7,003	225	C	Low
304	Shotcut	6,989	225	Start	Unknown
305	Quake engine	6,979	225	Start	Low
306	OpenStack	6,973	224	B	Low
307	Eric S. Raymond	6,952	224	C	High
308	The Apache Software Foundation	6,931	223	Start	High
309	MATE (desktop environment)	6,903	222	Start	Mid
310	Electronic health record	6,900	222	C	Mid
311	GNU Guix	6,897	222	C	Low
312	EBPF	6,848	220	C	Low
313	Citizenfour	6,836	220	C	Low
314	GNU GRUB	6,823	220	C	High
315	Haxe	6,801	219	C	Mid
316	EndeavourOS	6,787	218	Start	Low
317	Vue.js	6,753	217	C	Mid
318	Apache OpenOffice	6,747	217	C	High
319	Lemmy (social network)	6,736	217	C	Low
320	Metasploit	6,726	216	C	Low
321	MuseScore	6,720	216	C	Mid
322	Df (Unix)	6,697	216	C	Low
323	DistroWatch	6,690	215	Start	Mid
324	Fork (software development)	6,657	214	Start	High
325	Elementary OS	6,639	214	Start	Low
326	Ladybird (web browser)	6,626	213	Start	Low
327	JQuery	6,624	213	C	Mid
328	Bun (software)	6,608	213	C	Low
329	Pixelfed	6,603	213	Start	Mid
330	The Tor Project	6,592	212	C	Mid
331	Ubuntu Touch	6,561	211	C	Mid
332	Calibre (software)	6,524	210	C	Low
333	Jitsi	6,495	209	C	Mid
334	Luanti	6,483	209	C	Low
335	LibreOffice Writer	6,391	206	Start	High
336	RPM Package Manager	6,389	206	C	High
337	Fluxbox	6,386	206	Start	Low
338	Xorshift	6,365	205	C	Low
339	Celestia	6,352	204	C	Low
340	Android KitKat	6,299	203	B	Low
341	SUSE Linux Enterprise	6,226	200	C	Low
342	PostmarketOS	6,184	199	Start	Low
343	NetBeans	6,182	199	C	Mid
344	Hacker culture	6,161	198	C	Low
345	GNU Emacs	6,155	198	C	High
346	X.Org Server	6,016	194	B	Mid
347	Yuzu (emulator)	6,008	193	C	Low
348	Konqueror	5,968	192	Start	Mid
349	Open-source hardware	5,964	192	B	High
350	Atom (text editor)	5,942	191	C	Low
351	Ghidra	5,932	191	Stub	Mid
352	Spring Framework	5,920	190	C	Mid
353	KDE Plasma 6	5,910	190	Start	Unknown
354	Online piracy	5,898	190	Start	Low
355	LXQt	5,892	190	Start	Mid
356	KeePassXC	5,890	190	Start	Low
357	Leslie Lamport	5,869	189	C	Mid
358	Mesa (computer graphics)	5,858	188	C	Mid
359	Tux Paint	5,858	188	B	Mid
360	NetBSD	5,853	188	C	High
361	Gibberlink	5,843	188	Start	Low
362	Illumos	5,838	188	Start	Low
363	V8 (JavaScript engine)	5,832	188	C	High
364	PulseAudio	5,831	188	Start	Mid
365	Pale Moon	5,825	187	C	Low
366	Tcl (programming language)	5,821	187	C	Low
367	Puppy Linux	5,816	187	C	Low
368	Solus (operating system)	5,776	186	C	Low
369	Floorp	5,769	186	C	Low
370	D-Bus	5,737	185	C	Low
371	Android Jelly Bean	5,724	184	C	Mid
372	SPICE	5,710	184	C	Low
373	OpenHarmony	5,707	184	C	Low
374	Pirate Party	5,696	183	Start	Unknown
375	Glibc	5,681	183	C	High
376	Netcat	5,648	182	Start	Low
377	Edubuntu	5,604	180	Start	Low
378	Svelte	5,583	180	Start	Low
379	Snap (software)	5,578	179	C	Mid
380	Delta (emulator)	5,547	178	Start	Unknown
381	AdBlock	5,540	178	Start	Low
382	Message Passing Interface	5,532	178	C	Low
383	Ogg	5,516	177	B	Mid
384	MAME	5,507	177	C	High
385	Id Tech 3	5,495	177	C	Mid
386	WxWidgets	5,494	177	Start	Low
387	Ceph (software)	5,439	175	C	Low
388	Collabora Online	5,437	175	Start	Low
389	Rockbox	5,424	174	C	Low
390	Android Ice Cream Sandwich	5,417	174	C	Low
391	CMake	5,399	174	C	Mid
392	LibreOffice Calc	5,383	173	Start	High
393	Apache Cassandra	5,377	173	C	High
394	MX Linux	5,375	173	Start	Mid
395	OpenShot	5,367	173	Start	Low
396	Simple DirectMedia Layer	5,354	172	C	Low
397	Io uring	5,346	172	C	Low
398	Media Player Classic	5,334	172	C	High
399	List of commercial video games with available source code	5,333	172	C	Mid
400	Devuan	5,298	170	Start	Low
401	Flask (web framework)	5,296	170	C	Mid
402	Fabrice Bellard	5,286	170	Stub	Low
403	Rocq	5,281	170	C	Low
404	Outline VPN	5,276	170	Start	Low
405	VideoLAN	5,262	169	Start	Mid
406	Bourne shell	5,243	169	C	Mid
407	GNU Privacy Guard	5,237	168	C	Mid
408	Computer Modern	5,226	168	C	Mid
409	Llama.cpp	5,216	168	C	Low
410	CPython	5,193	167	C	High
411	Homebrew (package manager)	5,174	166	Start	Low
412	MkLinux	5,170	166	B	Low
413	Ian Murdock	5,163	166	C	Mid
414	Diagrams.net	5,155	166	Start	Low
415	Antergos	5,150	166	Start	Low
416	List of POSIX commands	5,115	165	List	High
417	Netfilter	5,112	164	C	Low
418	Musl	5,108	164	Start	Low
419	Servo (software)	5,098	164	Start	Low
420	Apache Subversion	5,096	164	B	Mid
421	Nix (package manager)	5,092	164	C	Low
422	Gettext	5,081	163	Start	Low
423	Cinelerra	5,047	162	Start	Low
424	Falkon	5,043	162	Start	Low
425	Lutris	4,989	160	Stub	Mid
426	Slurm Workload Manager	4,985	160	C	Low
427	Samba (software)	4,979	160	C	Low
428	Yacc	4,973	160	C	Mid
429	Apache Tomcat	4,971	160	Start	Low
430	ClamAV	4,955	159	C	Mid
431	WorldWideWeb	4,950	159	C	Low
432	System76	4,940	159	Start	Mid
433	Tmux	4,933	159	Start	Mid
434	Freeciv	4,890	157	C	High
435	Doom engine	4,877	157	C	Low
436	LXDE	4,875	157	Start	Mid
437	Lennart Poettering	4,872	157	Start	Mid
438	FreeRTOS	4,870	157	Start	Mid
439	Doom modding	4,856	156	C	Low
440	AbiWord	4,854	156	Start	Low
441	SageMath	4,845	156	C	Low
442	John the Ripper	4,842	156	Start	Low
443	XFS	4,841	156	C	Mid
444	Openbox	4,837	156	Start	Low
445	Dd (Unix)	4,814	155	C	Mid
446	NeoOffice	4,814	155	C	Mid
447	Joomla	4,812	155	C	Low
448	Zephyr (operating system)	4,808	155	C	Low
449	Zen of Python	4,797	154	C	Low
450	ChromiumOS	4,723	152	Start	Low
451	Friendica	4,723	152	C	Low
452	Maps.me	4,686	151	Start	Low
453	Inferno (operating system)	4,662	150	C	Low
454	Shadowsocks	4,638	149	Start	Low
455	GNU IceCat	4,633	149	Start	Low
456	XZ Utils	4,632	149	C	Mid
457	NetSurf	4,581	147	C	Low
458	Avidemux	4,564	147	C	Mid
459	Firefox OS	4,515	145	C	High
460	Direct Rendering Manager	4,503	145	C	Low
461	Bitcoin Cash	4,495	145	Start	Low
462	MinGW	4,482	144	Start	Low
463	DOSBox	4,482	144	GA	Mid
464	JDownloader	4,480	144	Start	Unknown
465	List of Android app stores	4,456	143	List	Low
466	Comparison of free and open-source software licenses	4,447	143	List	High
467	WinSCP	4,432	142	Start	Low
468	Podman	4,421	142	Stub	Low
469	OpenStep	4,416	142	Start	Low
470	TestDisk	4,394	141	Start	High
471	Ventoy	4,389	141	Start	Low
472	Antitrust (film)	4,384	141	B	Low
473	GNU Octave	4,377	141	C	Low
474	Mono (software)	4,375	141	B	Mid
475	Konversation	4,366	140	Stub	Low
476	Source-available software	4,361	140	Start	Mid
477	DigiKam	4,342	140	Start	Low
478	VM (operating system)	4,333	139	Start	Low
479	Rmdir	4,327	139	Start	Low
480	Nintendo Switch emulation	4,319	139	Start	Low
481	SerenityOS	4,318	139	C	Low
482	OpenSearch (software)	4,299	138	Start	Low
483	Deno (software)	4,252	137	C	Low
484	Editor war	4,251	137	C	Mid
485	LiMux	4,248	137	C	Mid
486	Tachiyomi	4,224	136	Start	Unknown
487	Sumatra PDF	4,211	135	C	Low
488	Adwaita (design language)	4,186	135	Start	Mid
489	Open-source license	4,159	134	GA	Top
490	Syncthing	4,132	133	Start	High
491	Proton Drive	4,122	132	Start	Mid
492	OpenRCT2	4,120	132	Start	Low
493	LXC	4,104	132	C	Low
494	WTFPL	4,092	132	Start	Mid
495	ClipGrab	4,092	132	Start	Low
496	Netscape (web browser)	4,091	131	Start	Low
497	Debian–Mozilla trademark dispute	4,061	131	C	Low
498	Apache Groovy	4,059	130	C	Low
499	Forgejo	4,055	130	Start	Unknown
500	Android Gingerbread	4,051	130	Start	Low

edit

Did you know?

... thatTerry Davis created TempleOS, a Bible-themed operating system that had more than 120,000 lines of code?(2025-03-20)
... that the browser extensionAdNauseam blocks and clicks on advertisements at the same time?(2025-01-06)
... that Riley Testut developedAltStore because he wanted to publish his emulatorDelta?(2024-06-01)
... that you can keep asnowflake in a browser tab?(2022-11-08)
... thatKotaku revised an article aboutNintendo Switch emulation after Nintendo complained that the previous version encouraged piracy?(2022-10-17)
... thatVegeta is used to attack HTTP-based applications?(2022-09-11)
... thatLeafpad is a text editor forLinux that is comparable toNotepad for Windows?(2022-08-30)

Transcluding 7 of 24total

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Topics

Free and open-source software

General

Types and standards	Comparison of licenses Contributor License Agreement Copyleft Debian Free Software Guidelines Definition of Free Cultural Works Free license The Free Software Definition The Open Source Definition Open-source license Permissive software license Public domain

Challenges

v t e Free and open-source typography
Software and libraries	FontForge Fontmatrix FreeType Ghostscript HarfBuzz Metafont MetaPost METATYPE1 Pango TeX Graphite (SIL) ICU
Licenses	Apache License BSD licenses Creative Commons licenses GNU General Public License +GPL font exception GNU Lesser General Public License LaTeX Project Public License MIT License SIL Open Font License Ubuntu Font Licence
Operating system, corporate and professional	Bitstream Charter Bitstream Vera DejaVu Breeze Sans Cantarell Charis SIL Computer Modern Concrete Roman Courier Prime Doulos SIL Droid Noto Open Sans Fira Sans Ghostscript fonts GNU FreeFont GNU Unifont Hershey fonts IBM Plex Liberation Croscore Literata Lohit Nimbus Mono Sans Roman OCR-A OCR-B Overpass PT Fonts Roboto Selawik Source Code Source Han Sans Source Han Serif Source Sans Source Serif STIX fonts Tiresias Ubuntu,Ubuntu Titling Utopia WenQuanYi Zilla Slab
Other typefaces	Antykwa Półtawskiego Allerta Asana-Math Cardo Chandas Comic Neue Cormorant EB Garamond Gentium Inconsolata IM Fell Jomolhari Junicode Kochi Lato Linux Libertine M+ News Cycle Open Baskerville OpenDyslexic Railway Sans Squarish Sans CT Theano Didot XITS
Groups and people	Donald Knuth Font Awesome Greek Font Society Font Library Google Fonts SIL International
Open-source Unicode typefaces List of open source typefaces List of free software Unicode typefaces