Coin3D GUI binding for Qt
WHATWG-compliant and fast URL parser written in modern C++, part of Node.js, Clickhouse, Redpanda, Kong, Telegram, Datadog and Cloudflare Workers.
High-quality pro HDR image resizing / scaling C++ library, including a very fast, precise, SIMD Lanczos resizer (header-only C++)
Helpers for Arrow C Data & Arrow C Stream interfaces
A JIT assembler for x86/x64 architectures supporting MMX, SSE (1-4), AVX (1-2, 512), FPU, APX, and AVX10.2
DirectStorage for Windows
Libxlsxwriter is a C library that can be used to write text, numbers, formulas and hyperlinks to multiple worksheets in an Excel 2007+ XLSX file.
OpenSSL is an open source project that provides a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It is also a general-purpose cryptography library.
A portable, simple zip library written in C
The CImg Library is a small, open-source, and modern C++ toolkit for image processing
Embedded web server, with TCP/IP network stack, MQTT and Websocket
The Geographic Data Abstraction Library for reading and writing geospatial raster and vector data
An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months between releases.
Event-Driven JSON Parser for C
The projectM Expression Evaluation Library. A portable drop-in replacement of Milkdrop's "ns-eel2" expression parser for use in Milkdrop, projectM and other applications. MIT licensed.
Production-grade client-side tracing, profiling, and analysis for complex software systems.
A modern, user friendly, generic, type-safe and fast C99 container library: String, Vector, Sorted and Unordered Map and Set, Deque, Forward List, Smart Pointers, Bitset and Random numbers.
The Qt Interface Framework module provides both the tools and the core APIs, for you to implement Middleware APIs, Middleware Back ends, and Middleware Services.
Value-type for composite class design for C++26 (reference implementation of std::indirect and std::polymorphic from p3019r14)
Library to write shaders directly from C++ code, supports GLSL, HLSL and SPIRV outputs.
miniz: Single C source file zlib-replacement library, originally from code.google.com/p/miniz
JPEG XL image format reference implementation
Very fast, high-quality hash function, discrete-incremental and streamed hashing-capable (non-cryptographic, inline C/C++) 27GB/s + PRNG
A tiny xml parsing library
Ruckig generates trajectories on-the-fly, allowing robots and machines to react instantaneously to sensor input.
A fast entity component system (ECS) for C & C++
mimic++, a modern and (mostly) macro free mocking framework.
Simple, portable, and self-contained stacktrace library for C++11 and newer
A library to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created.
Celero is a modern cross-platform (Windows, Linux, MacOS) Microbenchmarking library for C++ 11 and later.
A fast, small, safe, gradually typed embeddable scripting language derived from Lua
Z3 is a theorem prover from Microsoft Research
SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.
A high performance screen capturing library for Windows rewriting DXcam in C++.
Ultra High-performance Lightweight Embedded and Server OLTP RDBMS
HarfBuzz OpenType text shaping engine
Asynchronous Low Latency C++ Logging Library
Mirror only. Please do not send pull requests.
Unicode routines (UTF8, UTF16, UTF32) and Base64: billions of characters per second using SSE2, AVX2, NEON, AVX-512, RISC-V Vector Extension, LoongArch64, POWER. Part of Node.js, WebKit/Safari, Ladybird, Chromium, Cloudflare Workers and Bun.
libdatachannel is a standalone implementation of WebRTC Data Channels, WebRTC Media Transport, and WebSockets in C++17 with C bindings for POSIX platforms (including GNU/Linux, Android, and Apple macOS) and Microsoft Windows.
Meson build system
A single file C++11 header-only HTTP/HTTPS server and client library
Expected objects in C++11 and later in a single-file header-only library
C++11 (and onwards) library for lazy evaluation
Very fast synchronous and asynchronous C++17 logging library
Support types and functions for C++20 coroutines
sfcgal is a C++ wrapper library around CGAL with the aim of supporting ISO 191007:2013 and OGC Simple Features for 3D operations.
g2o: A General Framework for Graph Optimization
Sentry SDK for C, C++ and native applications.
Qt Base (Core, Gui, Widgets, Network, ...)