Top C-PLUS-PLUS GitHub Repositories & Tools (2026)

Widelands is a free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode. The game was inspired by Settlers II™ (© Bluebyte) but has significantly more variety and depth to it.

Bitcoin Core integration/staging tree

Cross-platform, customizable ML solutions for live and streaming media.

Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows, macOS and Haiku. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

static analysis of C/C++ code

:tangerine: Clementine Music Player

🛡 I2P: End-to-End encrypted and anonymous Internet

:strawberry: Strawberry Music Player

Cryptography Toolkit

edb is a cross-platform AArch32/x86/x86-64 debugger.

The C++ Standard Library for Parallelism and Concurrency

C/C++ WebRTC network library featuring Data Channels, Media Transport, and WebSockets

An open source C++ game engine.

Otter Browser aims to recreate the best aspects of the classic Opera (12.x) UI using Qt5

Modern C++ library for the development of real-time graphical applications

Sming - powerful open source framework simplifying the creation of embedded C++ applications.

A fast & densely stored hashmap and hashset