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

Native SDL3 port of Colin McRae Rally 2.0 built from the CMR2Decomp decompilation. No game data included.

A comprehensive Model Context Protocol (MCP) server that enables AI assistants to control Unreal Engine through the native C++ Automation Bridge plugin. Built with TypeScript and C++.

Various patches necessary for certain Intel Xe iGPUs

Bochs - Cross Platform x86 Emulator Project

C++ Library for Audio Digital Signal Processing

Window snapping, tiling and scrolling for KDE Plasma

XLS: Accelerated HW Synthesis

CasADi is a symbolic framework for numeric optimization implementing automatic differentiation in forward and reverse modes on sparse matrix-valued computational graphs. It supports self-contained C-code generation and interfaces state-of-the-art codes such as SUNDIALS, IPOPT etc. It can be used from C++, Python, Matlab/Octave, Julia or Javascript

Eternal Sonata, recompiled for PC.

Open-source simulator for autonomous driving research.

This revolutionary software enables EV battery packs to be easily reused for stationary storage in combination with solar inverters

C++ ggml runtime hub for multilingual ASR and TTS models: Cohere Transcribe, Parakeet TDT, Voxtral, Canary 1B v2, etc, plus universal forced alignment, and more

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

A composable and fully extensible C++ execution engine library for data management systems.

C++ and Python support for the CUDA Quantum programming model for heterogeneous quantum-classical workflows

Phantasy Star Online game server, proxy, and reverse-engineering tools

Simulationcraft engine/GUI

Speech synthesis, speech recognition and voice activity detection for voice conversation, in C++ on ggml: Qwen3-TTS, Irodori-TTS, Qwen3-ASR, ReazonSpeech, parakeet and Silero VAD on Metal, Vulkan and the CPU, with an OpenAI-compatible server and live transcription.

Run LLMs on AMD Ryzen™ AI NPUs in minutes; purpose-built and deeply optimized for the AMD NPUs.

Terminal-based messaging client for Linux and macOS with Telegram, WhatsApp and Signal support