You can make it - Open Source MMORPG Platform
A Native GOG and Epic Games Launcher for Linux, Windows and Mac
Godot is a powerful cross-platform game engine
A Minecraft Launcher which is multi-functional, cross-platform
The main repository for the Linux and Mac OS Bedrock edition Minecraft
Self-hosted game stream host for Moonlight
A cross-platform PSP emulator
Voxel game-creation platform with easy modding and game creation
The Modrinth monorepo containing all code which powers Modrinth
Xash3D FWGS engine
05k0nz's legacy is safe
Mangos ZERO is a server for World of Warcraft
A complete 3-D game development suite written in Java
HTML5 Phigros chart player/simulator
An Open Source Minecraft Launcher with Modern UX
A lightweight, modular and versatile mod loader for Minecraft Bedrock
Set of Python modules designed for writing video games
Lightweight console for Minecraft chat and automated scripts
Stream switch games to your PC via USB or network
Allows the connection of newer clients to older server versions
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
Open source cross-platform multi-purpose game toolkit
Free, cross-platform 2D game engine powered by Haxe and OpenFL