Top C++ GitHub Repositories (2026) · Open Source Projects

Eternal Sonata, recompiled for PC.

An open-source 3DS emulator project based on Citra.

Low Level Emulation of classic VA synths & effects of the late 90s/2000s by emulating the used ICs

Read-only LibreOffice core repo - no pull request (use gerrit instead https://gerrit.libreoffice.org/) - don't download zip, use https://dev-www.libreoffice.org/bundles/ instead

Hyprland is an independent, highly customizable, dynamic tiling Wayland compositor that doesn't sacrifice on its looks.

A C++ header-only HTTP/HTTPS server and client library

Train and serve LLMs at extreme speed and massive throughput.

A set of performant RDNA/HIP patches against llama.cpp focusing on high speed inferencing with numerics assurance

Tools for Guild Wars players

GenZ-LIO: SOTA robust LiDAR-inertial odometry (IEEE T-FR 2026)

Library for conversion between Traditional and Simplified Chinese

cross-platform (Qt), open-source (GPLv3) video editor

llama.cpp fork for significantly improved performance on Ampere (especially RTX 3090 / 3090 Ti): example: 95+ tok/s over a 100K-token generation at temperature 1 for qwen3.8, supporting full 262K ctx. Supports low memory (12gb) configs for 200k+ ctx

Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

Private, fast, and honest web browser

3D engine with modern graphics

A library that provides an embeddable, persistent key-value store for fast storage.

The ultimate Geometry Dash modding framework

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.

An open-source, high-performance quantitative trading framework in C++/Python focused on strategy analysis and backtesting Trading model R&D · Ultra-fast engine · Efficient backtesting