Top CPP GitHub Repositories & Tools (2026)

C++ Client Libraries for Google Cloud Services

eepp is an open source cross-platform game and application development framework heavily focused on the development of rich graphical user interfaces.

RAJA Performance Portability Layer (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.

Cross-platform on-device AI toolkit

Cross-platform Total Commander-like orthodox file manager for Windows, Mac and Linux

a community oriented 1:1, vLLM-alike (Continuous batching, paged KV) engine in C++ with additional features (GGUF, RadixAttention, Cache-aware scheduling, ...)

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

A general-purpose lightweight C++ graph library

An Event-Driven, Asynchronous, Behavioral State Machine Library for ROS2 (Robotic Operating System) applications written in C++

Abstraction layer over Khronos Vulkan API

Fast and lightweight Continuous Integration

ICPP - Run C++ anywhere, just like a script.

2D/3D graphics engine written in C++ language. It currently supports the following graphics APIs: OpenGL 3.3+, Vulkan 1.2, DirectX 11. Its current purpose is to experiment with various CG concepts and techniques.

Your car as a chat-room agent: Raspberry Pi 5 + dashcam + local AI. CodeWatch's sibling for the garage.

A next-generation C++ language server for modern C++, focused on high performance and deep code intelligence

Smith is a high order nonlinear thermomechanical simulation code

C++ Library for Audio Digital Signal Processing

🚢 Yet another operator for running large language models on Kubernetes with ease. Powered by Ollama! 🐫

The Charm++ parallel programming system. Visit https://charmplusplus.org/ for more information.