Cpp GitHub Repositories (2026) · Open Source Tools

A Fan-Driven Server Platform Preserving the Legacy of a Legendary MMORPG for Over Two Decades and Going

Platform Abstraction C++ Libraries

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

Jinja2 C++ (and for C++) almost full-conformance template engine implementation

SPHinXsys provides C++ APIs for engineering simulation and optimization. It aims at complex systems driven by fluid, structure, multi-body dynamics and beyond. The multi-physics library is based on a unique and unified computational framework by which strong coupling has been achieved for all involved physics.

Cross-platform GPU-oriented C++ application/game framework

A modern, fast, lightweight thread pool library based on C++2x

Integration between ROS (1 and 2) and Gazebo simulation

Explore diverse LeetCode solutions in Python, C++, JavaScript, SQL, and TypeScript. Ideal for interview prep, learning, and code practice in multiple programming languages.

Fast, convenient JSON serialization and parsing in C++

An unordered C++ data container providing fast iteration/insertion/erasure while maintaining pointer/iterator validity to non-erased elements regardless of insertions/erasures. Provides higher-performance than std:: library containers for high-modification scenarios with unordered data.

In-editor scripting and sandboxing for Godot 4.4+

High-performance Mahjong win detection, waiting-hand calculation and AI discard algorithm based on lookup tables, with behavior-identical Java / Go / C++ implementations and a live web demo.

csp is a high performance reactive stream processing library, written in C++ and Python

C++ Client Libraries for Google Cloud Services

The fastest automatic differentiation library for C++, with Python bindings. Forward, adjoint and higher-order derivatives, checkpointing, Eigen support and JIT. Reproducible benchmarks against CppAD, Adept and autodiff.

:rocket: Launchy project reactivated. Get the familiar feeling now!

An application-focused API for memory management on NUMA & GPU architectures

Caliper is an instrumentation and performance profiling library

Experimental Roblox compatibility runtime for Linux and FreeBSD