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

A matching decompilation of Metroid Prime

DuckDB is an analytical in-process SQL database management system

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 C++ library for simulating Rocket League games at maximum efficiency

Capture and analyze the high-level performance characteristics of graphics applications on Windows.

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

sc-offline: offline single-player mod menu for Star Citizen (based on ChrisWareOffline). Ships, NPCs, build mode, travel, Squadron 42 outfits. Needs EAC off. Fan project.

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++.

Webots Robot Simulator

XLS: Accelerated HW Synthesis

Truly independent web browser

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

Abseil Common Libraries (C++)

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

Zwift bridge for smart treadmills and bike/cyclette

A native C++ port of Gran Turismo 2 for Web, Steam Deck, MacOS, Windows PC, PCVR and Quest 3 Standalone VR

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

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.

Skia is a complete 2D graphic library for drawing Text, Geometries, and Images. See documentation for contribution instructions.