Cpp GitHub Repositories (2026) · Open Source Tools

A C++ library to create desktop applications

Paged HTML Rendering Library

Fast, lightweight markdown viewer & reader for Windows. Native C++ with Direct2D — <5MB binary, <100ms startup, no Electron. 10 themes, TOC, search, edit mode.

Xeno Executor — free keyless Roblox script executor for Windows x64. Luau runtime, manual-map DLL injector, ImGui overlay (2026).

A set of reusable functions to integrate IPC into an existing simulation.

High-performance document and image viewer that prioritizes screen space and control.

Firebase C++ SDK

🟢 Ultra-fast, tiny C/C++ tracing and logging, even in interrupts ⚡, with printf-like syntax and real-time PC visualization 💻

Implementation of async observable/observer (Reactive Programming) in C++ with care about performance and templates in mind in ReactiveX approach

🔬 microscope 🔬

A service proxy that provides API management capabilities using Google Service Infrastructure.

ANARI Software Development Kit (SDK)

SortMeRNA: next-generation sequence filtering and alignment tool

MySQL C++ client based on Boost.Asio

C++20 concurrency framework with no compromises. Excellent performance, powerful features, and simple syntax.

YASMIN (Yet Another State MachINe)

Super aggressive chess engine

amp-embedded-infra-lib is a set of C++ libraries and headers that provide heap-less, STL like, infrastructure for embedded software development

FlameRobin is a database administration tool for Firebird RDBMS. Our goal is to build a tool that is: lightweight (small footprint, fast execution) cross-platform (Linux, Windows, Mac OS, FreeBSD) dependent only on other Open Source software

Keyvi - the key value index. It is an in-memory FST-based data structure highly optimized for size and lookup performance.