free C++ class library of cryptographic schemes

Aleth – Ethereum C++ client, tools and libraries

All Algorithms implemented in C++

Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU

static analysis of C/C++ code

an efficient feature complete C++ bittorrent implementation

A PSP emulator for Android, Windows, Mac and Linux, written in C++. Want to contribute? Join us on Discord athttps://discord.gg/5NJB6dD or in #ppsspp on freenode (IRC) or just send pull requests / issues. For discussion use the forums on ppsspp.org.

Apache Arrow is a cross-language development platform for in-memory data. It specifies a standardized language-independent columnar memory format for flat and hierarchical data, organized for efficient analytic operations on modern hardware. It also provides computational libraries and zero-copy streaming messaging and interprocess communication…

Abseil Common Libraries (C++)

mlpack: a scalable C++ machine learning library --