C Plus Plus GitHub Repositories (2026) · Open Source Tools

A Modern C++ Text-Based Widget Toolkit (TUI)

A reimplementation of BioWare's Aurora engine (and derivatives). Pre-pre-alpha :P

Free open-source modern C++20/23 framework to create console (CLI), forms (GUI like WinForms) and unit test (xUnit) applications and libraries on Windows, macOS, Linux, iOS, Android, FreeBSD, Haiku, and SerenityOS.

Community-driven advanced graphics modifications for AE, SE and VR.

CasparCG Server is a Windows and Linux software used to play out professional graphics, audio and video to multiple outputs. It has been in 24/7 broadcast production since 2006. Ready-to-use downloads are available under the Releases tab https://casparcg.com.

Device OS (Firmware) for Particle Devices

A single file C++ header-only PEG (Parsing Expression Grammars) library

A set of common support code for medical imaging, surgical navigation, and related purposes.

C++ library for solving large sparse linear systems with algebraic multigrid method

Nazara Engine is a cross-platform framework aimed at (but not limited to) real-time applications requiring audio, 2D and 3D real-time rendering, network and more.

Realtime Math

Simple, small, C++ embeddable webserver with WebSockets support

Rocket

Modern C++ quantum computing library

Cross-platform Total Commander-like orthodox file manager for Windows, Mac and Linux

Unofficial open-source OpenGL/SDL2 reimplementation of Sid Meier's Alpha Centauri ( + Alien Crossfire )

A Fan-Driven Server Platform Preserving the Legacy of a Legendary MMORPG for Over Two Decades and Going

View and edit guitar tablature.

Declarative UI toolkit for modern C++20

Jinja2 C++ (and for C++) almost full-conformance template engine implementation