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

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

TreeSheets : Free Form Data Organizer (see strlen.com/treesheets)

Dual_LIDAR_constraint_level fusion LIO for degenerate environments

An open ecosystem for music production.

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++.

ReShade add-on that removes DLSS and FSR ghosting from glass cockpit displays (PFD, ND, ECAM) in Microsoft Flight Simulator 2024, on a monitor and in VR

C++ Library for Audio Digital Signal Processing

Strata minus the bullshit. clone, rsync to prod, compile and go

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

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

Fukami: native macOS / Steam Deck port of Ridge Racer V (USA) by static recompilation. No game data.

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

Local inference engine for Qwen3.8-Flash-Next on NVIDIA Blackwell

Simulationcraft engine/GUI