A completely free, open-source, 2D game engine
Unity3D Client And C# Server Framework
Botcraft is a cross-platform C++ library to create bots
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Simple and powerful Unity3d game workflow!
Endless Sky is a sandbox-style space exploration game
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A Minecraft server in Rust focused on a strong foundation
A tool to snap pixels to a perfect grid
Play! - PlayStation2 Emulator
Java library that enables cross-platform access to popular native APIs
Stream switch games to your PC via USB or network
Creative cellular automata browser game
Fully-functional open-source server implementation for Diablo 3
Linux distribution that transforms a computers into game consoles
A game engine with an emphasis on real-time cutting-edge solutions
Zig game engine & graphics toolkit
PS2 Covers Collection
A re-implementation of Freelancer
Native Android app for Habitica
Simple Beat Saber Mod Installer
A shield for the Arduino Mega that can back up video game cartridges
PhantomBot is an actively developed open source interactive Twitch bot
The ioquake3 community effort to continue supporting/developing id's