Cpp GitHub Repositories (2026) · Open Source Tools

Catch2, Google Test and doctest Adapter for the VSCode

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

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

A tool for generating cross-language type declarations and interface bindings. Djinni's new home is in the Snapchat org.

Fast lossless data compression in C++

API abstraction layer for 3D graphics, UI and sound. Written in C++17 with Vulkan, DX12 and Metal support.

MinIO C++ Client SDK for Amazon S3 Compatible Cloud Storage

Modern C++ actor framework based on std::execution, only requires C++20 - Turns your class into async service.

Insight Toolkit (ITK) -- Official Repository. ITK builds on a proven, spatially-oriented architecture for processing, segmentation, and registration of scientific images in two, three, or more dimensions.

rust.std in c++

🪁All the DSA(Data-Structures & Algorithms) 📒Concepts and 📏Implementations📐 |📈 FAANG Must Do Problems |🔰 CP |📑SDE Sheet's |🖊️ CSE Core Subjects(DBMS + MySql, OOP's, OS & CN) | ✏️Round 1(Aptitude, Logical Reasoning, Puzzle's, Programing MCQ's & Verbal ability) and 🃏Projects. || 🎯Aim :- Help 👨‍🚀Students who are preparing for SDE Interview's🏆.

This repository is for active development of the Azure SDK for C++. For consumers of the SDK we recommend visiting our versioned developer docs at https://azure.github.io/azure-sdk-for-cpp.

A modern C++ module-first build tool — written in pure C++23 modules, fully self-hosted

CS infrastructure components for HPC applications

C++ symbol name demangler written in Go

A minimal, low-fuss wrapper that can run simple command-line 32-bit Windows binaries on Linux and macOS.

JIntellitype is a Java API for interacting with Microsoft Intellitype commands as well as registering for Global Hotkeys in your Java application.

C++23 client for NOAA Storm Prediction Center convective and fire-weather outlooks, mesoscale discussions, watches, and storm reports.

Apache NiFi - MiNiFi C++

A drop-in replacement for std::list with 293% faster insertion, 57% faster erasure, 17% faster iteration and 77% faster sorting on average. 20-24% speed increase in use-case testing.