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

A framework for building native applications using React

macOS Quick Look extension for Markdown files.

PlayStation 2 emulator for Android with a PCSX2-based core adapted by EmuCoreX, a modern game library, live overlay controls, and a handheld-focused experience.

Mirror of Eden. PRs welcome.

QGIS is a free, open source, cross platform (lin/win/mac) geographical information system (GIS)

A mirror of https://codeberg.org/comaps/comaps. CoMaps is a community fork of Organic Maps. Based on principles of openness & transparency, not-for-profit & in the public interest, community-driven & accountable, fully free and open source software!

FlashRT is a high-performance realtime inference engine for small-batch, latency-sensitive AI workloads. The flagship integration is production VLA control for Pi0, Pi0.5, GROOT N1.6, and Pi0-FAST. Also support llm e.g, qwen3.6-27B

A game mod that uses NVIDIA AI to change lighting, detail and colour, with controls for strength and performance.

A native Android port of Mario Kart Wii and Retro Rewind. Fast, easy.

Audio Plugin for Audio to MIDI transcription using deep learning.

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.

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

Cloud Native Runtime Security

TrinityCore Open Source MMO Framework (master = 12.1.0.69933, 3.3.5 = 3.3.5a.12340, cata classic = 4.4.2.60895)

Omni inference in C/C++

TRELLIS.2 image-to-3D in C++/GGML (CUDA + Vulkan), with a resident HTTP server

Experimental dual emulator for sony ps4 & ps5 consoles

Downloads spotify playlists and songs along with metadata through an easy to use GUI (Downloads from YouTube)

AI pair programming in your terminal — one static binary, sub-ms startup, any model

Project AirSim is Microsoft's evolution of AirSim, an advanced simulation platform for building, training, and testing autonomous systems in high-fidelity virtual environments