A Native GOG and Epic Games Launcher for Linux, Windows and Mac
You can make it - Open Source MMORPG Platform
A Minecraft Launcher which is multi-functional, cross-platform
Godot is a powerful cross-platform game engine
Scripting platform, modding framework and VR support for RE Engine
A cross-platform PSP emulator
The main repository for the Linux and Mac OS Bedrock edition Minecraft
Lutris desktop client in Python
Xash3D FWGS engine
A complete 3-D game development suite written in Java
Self-hosted game stream host for Moonlight
A Minecraft Java Edition Launcher for Android and iOS
Set of Python modules designed for writing video games
Voxel game-creation platform with easy modding and game creation
One framework for creating powerful cross-platform games
Cross-platform rhythm game for the keyboard
s&box is a modern game engine, built on Valve's Source 2
Cross-platform 2D and 3D game engine with modular architecture
Stream switch games to your PC via USB or network
Allows the connection of newer clients to older server versions
Open Source MMORPG Framework
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Mangos ZERO is a server for World of Warcraft
Cross-Platform C++ 2D/3D game engine
Desktop/Android/HTML5/iOS Java game development framework