C Plus Plus GitHub Repositories (2026) · Open Source Tools

3D viewer and post processing of reservoir models

Limited Error Raster Compression

CS infrastructure components for HPC applications

A C++17 message passing library based on MPI

: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

Calaos server

A Qt library to write cross-platform clients for Matrix

Use pytest's runner to discover and execute C++ tests

Updated fork of Spatterlight

Duplicates finder for various source code formats.

A suite of tools for medical image processing focused on brain analysis

O2 software project for the ALICE experiment at CERN

Joedb, the Journal-Only Embedded Database

A fast and flexible c++ template class for tree data structures

state-of-the-art C++ pseudo-random number generator library for sequential and parallel Monte Carlo simulations

"Ü" programming language

Official AscEmu repo... a never ending place to work. With cutting edge technologies XD

Xzero HTTP Application Server

Sameko Dev C++: free C++ IDE, download at sameko.dev. GCC 16, clangd and GDB bundled, made for learning and competitive programming. (≧◡≦)