Top Welcoming Open-Source C++ Repositories

Cataclysm: Bright Nights: A fork/variant of Cataclysm:DDA by CleverRaven with a mod registry at https://mods.cataclysmbn.org/

The ultimate cross-platform mining experience.

Native amateur-radio workstation for FlexRadio (FLEX-6000/8000/Aurora) — Linux, macOS, Windows · Qt6 + C++20

The Zap Programming Language

The efficient SMT-based context-bounded model checker (ESBMC)

PenUltima Online (POL) is a MMO server, compatible with most Ultima Online clients. POL is customizable via configuration files and has its own scripting language (eScript).

Community-maintained source port of the original Little Big Adventure 2 (Twinsen’s Odyssey) engine.

水杉输入法 Windows 产品：TSF、Server、GUI、设置页与安装器。内测：tg: https://t.me/msimegroup QQ Group: 829919142

A fix that restores broken visual effects, fixes vanilla game crashes, adds custom resolutions, and much more to the Metal Gear Solid Master Collection.

VillageSQL - a drop-in replacement for MySQL with extensions

Simple Theorem Prover, an efficient SMT solver for bitvectors, floating-point and arrays.

Robotics Toolbox for Python

Run MoE models bigger than your RAM. Frontier-size MoE on a 12 GB phone, lossless, on stock llama.cpp

Turn your harmony device into a powerful game streaming terminal! Gawr! ✨

TeXstudio is a fully featured LaTeX editor. Our goal is to make writing LaTeX documents as easy and comfortable as possible.

Sony PlayStation game static recompiler ecosystem · Part of the R.A.I.D. community

The First Real-Time Search Analytics Database

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

Production-grade client-side tracing, profiling, and analysis for complex software systems.

ArcGIS Maps SDK for Qt Toolkit

MaaEnd 终末地小助手：基于视觉 AI 的「明日方舟：终末地」自动化工具

TONE3000 plugin

Hyperspace -- A mod for FTL: Faster than Light

All-in-one solution for creating networked applications with RPC, pub/sub, server deployment, and more.

A C++ header-only YAML library

Embedded Linker (eld)

Model-based design and verification for robotics.

Cataclysm - Dark Days Ahead. A turn-based survival game set in a post-apocalyptic world.

Community-driven advanced graphics modifications for AE, SE and VR.

Cataclysm:Cleanwater Bomb（大灾变：净化协议）是一款基于CDDA Commit221c786e7d实验版的分支。该分支主旨为兼顾真实性与游戏性，保留一定的CDDA风味的同时发展出自己的特色。本分支支持有大量参考文献支撑的符合现实逻辑与玩家直觉的改动，同时反对刻意为玩家游玩增加困难或无法给出可能造成的影响任何处理方案的改动，明确真实性不等于削弱也不等于缺乏游戏性，改动的同时要兼顾游戏性。

A customisable music player

Implementation of the Google Zero-Knowledge library for Identity Protocols.

AMReX-based structured grid fluid solver

A gui for the computer algebra system Maxima built with wxWidgets

Flutter Linux C++ embedder for desktop and embedded/automotive displays — Wayland, DRM/KMS, EGL, Vulkan (incl. zero-copy dma-buf), and software backends

Odamex - Online Multiplayer Doom port with a strong focus on the original gameplay while providing a breadth of enhancements.

3D viewer and post processing of reservoir models

A Nintendo DS demake of Persona 3, developed in C++

UZDoom is a feature centric port for all Doom engine games, based on GZDoom, adding an advanced renderer and powerful scripting capabilities

Rendering engine for the Carbon Game Engine

The development repository for the deal.II finite element library

A collection of GTK4-based desktop components designed for Wayfire and Wlroots desktops

Vulkan Validation Layers (VVL)

The switch fell off https://citron-neo.org/

Official Repository of WPILibJ and WPILibC

Cataclysm: The Last Generation

C++ ODBC wrapper

Verible is a suite of SystemVerilog developer tools, including a parser, style-linter, formatter and language server

A modular and extensible wayland compositor