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

Command the forces of The Project in a battle to rebuild the world after mankind has been nearly destroyed by nuclear missiles. A 100% free and open source real-time strategy game for Windows, macOS, Linux, BSD+

Nord Modular G1 emulator (68331 + DSP56303), playable from Animatek NME

Bash's powerful command line editing in cmd.exe

The General Mission Analysis Tool (GMAT) is the world's leading enterprise, multi-mission, open source software system for space mission design, optimization, and navigation. The system supports missions in flight regimes ranging from low Earth orbit to lunar, libration point, and deep space missions. NOTE: Non-release tagged commits are AS IS.

Zwift bridge for smart treadmills and bike/cyclette

Optimal Reciprocal Collision Avoidance (C++)

Thermophysical properties for the masses

Neural-coprocessor *MGPU Bridge* ReShade add-on that runs DLSS Neural Rendering on a second GPU while the first renders the game. Not SLI — neural post-processing is a terminal stage, so it can be executed on another device entirely. Measured on dual RTX 5060 Ti, with the method and the mistakes published.

Modular RDMA Interface

Apollo-derived Linux game-streaming host with low-latency virtual displays via Hermes-KMS (zero-copy DRM/KMS), with EVDI still supported. Moonlight/Artemis/Hestia compatible.

An automation tool for OBS Studio

An open source re-implementation of RollerCoaster Tycoon 2 🎢

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

Remote desktop and file transfer tool.

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

A Hyprland plugin which generates a magnifying glass with a flowing liquid effect centered on your mouse cursor

NVIDIA's official DLSS 3/4/4.5 on AMD RDNA3/4 GPUs on Windows and Linux.

Odamex - Online Multiplayer Doom port with a strong focus on the original gameplay while providing a breadth of enhancements.

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

Intel® Implicit SPMD Program Compiler