header-only-library

A C++14-compatible physical units library with no dependencies and a single-file delivery option. Emphasis on safety, accessibility, performance, and developer experience.

cpp cpp14 units-of-measure bazel dimensional-analysis units header-only compile-time physical-quantities no-dependencies unit-of-measure quantity units-of-measurement physical-units cpp14-library single-header-library header-only-library

UpdatedDec 16, 2025
C++

bobluppes /graaf

Star357

A general-purpose lightweight C++ graph library

algorithm algorithms cpp graph header-only dfs search-algorithm bfs cpp-library dfs-algorithm bfs-algorithm cpp20 shortest-path-algorithm graph-algorigthms header-only-library

UpdatedNov 26, 2025
C++

Loki-Astari /ThorsAnvil

Star319

C++ MongoDB API and BSON/JSON Serialization library

c-plus-plus mongo database networking mongodb cxx nosql driver json-serialization bson database-driver mongodb-driver bson-library c-plus-plus-20 bson-serialization header-only-library

UpdatedDec 17, 2025
C++

fktn-k /fkYAML

Sponsor

Star127

A C++ header-only YAML library

yaml cmake cpp cpp14 cpp11 header-only yaml-parser cpp17 single-header cpp20 cpp23 header-only-library fkyaml

UpdatedJul 21, 2025
C++

rbock /sqlpp23

Star109

A type safe SQL library for C++

sql cpp23 header-only-library

UpdatedDec 15, 2025
C++

ccgargantua /arena-allocator

Star101

Super small, simple, and (almost) completely C89-compliant single-header arena "allocator".

c library simple memory ansi allocator small header-only c89 ansi-c contributions-welcome single-header simple-project c90 small-project single-header-library header-only-library

UpdatedDec 8, 2025
C

codeinred /recursive-variant

Star96

Recursive Variant: A simple library for Recursive Variant Types

cpp functional-programming recursion variants header-only variant sum-types cpp20 recursive-types header-only-library

UpdatedMay 28, 2025
C++

sentomk /patternia

Star96

Providing pattern matching for modern c++.

cross-platform cpp pattern-matching modern-cpp cpp17 cpp20 cpp23 header-only-library

UpdatedDec 18, 2025
C++

Jaysmito101 /lexpp

Sponsor

Star67

Small Extremely Powerful Header Only C++ Lexical Analyzer/String Parser Library

cpp11 header-only lexer string-parser lexical-analyzer header-only-library

UpdatedJan 1, 2024
C++

ZigRazor /CXXStateTree

Star65

A C++ Header-Only Hierarchical State Tree Library

gaming state-machine cpp cpp-library cpp20 header-only-library statetrees

UpdatedJul 21, 2025
C++

z4kn4fein /cpp-semver

Star53

Semantic Versioning library for modern C++.

cplusplus cpp semver semantic-versioning header-only cpp17 semantic-version cplusplus-17 single-file-library header-only-library

UpdatedJul 7, 2025
C++

oluan /ninjaipc

Star50

Header-only C/C++ IPC for Windows, Linux and macOS.

c windows macos linux cross-platform cpp ipc posix header-only header-only-lib header-only-library

UpdatedSep 10, 2023
C++

Boostibot /cbasis

Star50

A collection of freestanding single-header libraries for modern C development

platform-layer header-only-library

UpdatedSep 21, 2025
C

HexadigmSystems /FunctionTraits

Star46

Professionally written C++ function traits library (single header-only) for retrieving info about any function (arg types, arg count, return type, etc.)

types cpp parameters functions templates arguments traits header-only-library