Godot Engine – Multi-platform 2D and 3D game engine

DuckDB is an analytical in-process SQL database management system

Carbon Language's main repository: documents, design, implementation, and related tools. (NOTE: Carbon Language is experimental; see README)

An open-source C++ library developed and used at Facebook.

A modern replacement for Redis and Memcached

SRS is a simple, high-efficiency, real-time media server supporting RTMP, WebRTC, HLS, HTTP-FLV, HTTP-TS, SRT, MPEG-DASH, and GB28181, with codec support for H.264, H.265, AV1, VP9, AAC, Opus, and …

KeePassXC is a cross-platform community-driven port of the Windows application “KeePass Password Safe”.

Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

NoSQL data store using the Seastar framework, compatible with Apache Cassandra and Amazon DynamoDB

Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more

Redpanda is a streaming data platform for developers. Kafka API compatible. 10x faster. No ZooKeeper. No JVM!

Multi-Joint dynamics with Contact. A general purpose physics simulator.

High performance server-side application framework

A multi core friendly rigid body physics and collision detection library. Written in C++. Suitable for games and VR applications. Used by Horizon Forbidden West.

A Tunnel which Turns UDP Traffic into Encrypted UDP/FakeTCP/ICMP Traffic by using Raw Socket,helps you Bypass UDP FireWalls(or Unstable UDP Environment)

Complete Open Source and Modular solution for MMO

Wechat Chat History Exporter 微信聊天记录导出备份程序

Valdi is a cross-platform UI framework that delivers native performance without sacrificing developer velocity.

OpenMW is an open-source open-world RPG game engine that supports playing Morrowind. Main repo and issue tracker can be found here: https://gitlab.com/OpenMW/openmw/

A personal experimental C++ Syntax 2 -> Syntax 1 compiler

Double-entry accounting system with a command-line reporting interface

Asio C++ Library

A fast, small, safe, gradually typed embeddable scripting language derived from Lua

Making it easier to work with shaders

A beautiful stack trace pretty printer for C++

A heap memory profiler for Linux

OpenThread released by Google is an open-source implementation of the Thread networking protocol

Research programming language for concurrent ownership

C++ Reflection Library

A date and time library based on the C++11/14/17 <chrono> header