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
A Minecraft Java Edition Launcher for Android and iOS
Xash3D FWGS engine
The main repository for the Linux and Mac OS Bedrock edition Minecraft
Cocos simplifies game creation and distribution with Cocos Creator
The Modrinth monorepo containing all code which powers Modrinth
A complete 3-D game development suite written in Java
Atmosphère is a work-in-progress customized firmware for the Nintendo
A cross-platform PSP emulator
An Open Source Minecraft Launcher with Modern UX
Open source cross-platform multi-purpose game toolkit
A certain block game
Lutris desktop client in Python
Set of Python modules designed for writing video games
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
Voxel game-creation platform with easy modding and game creation
A bridge/proxy allowing you to connect to Minecraft
Desktop/Android/HTML5/iOS Java game development framework
Powerful, mature open-source cross-platform game engine for Python
Cross-platform rhythm game for the keyboard