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
s&box is a modern game engine, built on Valve's Source 2
Self-hosted game stream host for Moonlight
Xash3D FWGS engine
The main repository for the Linux and Mac OS Bedrock edition Minecraft
The Modrinth monorepo containing all code which powers Modrinth
A cross-platform PSP emulator
Cocos simplifies game creation and distribution with Cocos Creator
Open source cross-platform multi-purpose game toolkit
A complete 3-D game development suite written in Java
An Open Source Minecraft Launcher with Modern UX
Mangos ZERO is a server for World of Warcraft
A certain block game
Set of Python modules designed for writing video games
Voxel game-creation platform with easy modding and game creation
A high performance and high compatibility 1.12.2/1.16.5/1.18.2 version
A lightweight, modular and versatile mod loader for Minecraft Bedrock
Powerful, mature open-source cross-platform game engine for Python
A bridge/proxy allowing you to connect to Minecraft
An unofficial PC port of the Xbox 360 version of Sonic Unleashed
Mod manager for the video game RimWorld
Desktop/Android/HTML5/iOS Java game development framework
Make Minecraft Java Edition mods, Minecraft Bedrock Edition Add-Ons