Top C-PLUS-PLUS GitHub Repositories & Tools (2026)

C++ Library for Audio Digital Signal Processing

Open Babel is a chemical toolbox designed to speak the many languages of chemical data.

CMS Offline Software

scanf for modern C++

Free/Libre Action Roleplaying Engine (engine only)

A modern C++ CSV parser and serializer that doesn't make you choose between ease of use or performance.

Open Source Visual Servoing Platform

RAJA Performance Portability Layer (C++)

ZQuest Classic is a game engine for creating games similar to the original NES Zelda

Large collection of number systems providing custom arithmetic for mixed-precision algorithm development and optimization for AI, Machine Learning, Computer Vision, Signal Processing, CAE, EDA, control, optimization, estimation, and approximation.

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

A C++-based, cross platform ray tracing library

FOnline Engine is a flexible cross-platform isometric game engine

:gem: Feel++: Finite Element Embedded Language and Library in C++

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.

LargeScale Multiphysics Scientific Simulation Environment-OneFLOW CFD

Main repository for Mantid code

ROS 2 nodes wrapping core MRPT functionality: localization, autonomous navigation, rawlogs, etc. SLAM is in other packages.

:globe_with_meridians: Fast 3D file format converter in C++ supporting OBJ, 3DS, MA, MB, XSI, LWO, DXF, STL, MAT, DAE.

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