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

Open Source Computer Vision Library

Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies

The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)

LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.

Scriptable Headless Browser

The open-source database for the realtime web.

Lightweight, Portable, Flexible Distributed/Mobile Deep Learning with Dynamic, Mutation-aware Dataflow Dep Scheduler; for Python, R, Julia, Scala, Go, Javascript and more

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

Convert HTML to PDF using Webkit (QtWebKit)

DOOM Open Source Release

World's largest Contributor driven code dataset | Used in Quark Search Engine, @OpenGenus IQ, OpenGenus Visual Project

Offline documentation browser inspired by Dash

An open source smart contract platform

Code repository of all OpenGL chapters from the book and its accompanying website https://learnopengl.com

OpenGL Mathematics (GLM)

3D engine with modern graphics

Space exploration, trading, and combat game.

Decentralized cryptocurrency blockchain daemon implementing the XRP Ledger protocol in C++

WonderTrader——量化研发交易一站式框架

Mapnik is an open source toolkit for developing mapping applications

A lightweight game engine written in modern C++

lmctfy is the open source version of Google’s container stack, which provides Linux application containers.

The Lobster Programming Language

2D game development library for Ruby and C++

3D game engine with lua scripting

Embed the V8 Javascript Interpreter into Ruby

An open source C++ game engine.

Cross-Platform C++ 2D/3D game engine

Modern C++ order matching engine