Open source Old School RuneScape client
Custom launcher for Minecraft to easily manage installations
A plugin loader for the Steam Deck
PufferPanel is an open source game server management panel
Make Minecraft Java Edition mods, Minecraft Bedrock Edition Add-Ons
Custom launcher to manage multiple installations of Minecraft at once
Grimmory is the successor of booklore
Free, Secure, Distributed, Modern Control Panel for Minecraft
Mod manager for the video game RimWorld
A permissions plugin for Minecraft servers
A free/open source client and automation tool for Ragnarok Online
Empowering everyone to host fast and efficient Minecraft servers
Free game engine for development of desktop, mobile, and web games
MCDaemon, a python tool to control your Minecraft server
A completely free, open-source, 2D game engine
Cross-platform 2D and 3D game engine with modular architecture
Source code repository of the FreeOrion project
A Minecraft Mod about Matter and Energy
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Self-hosted CMS platform based on the Laravel PHP Framework
Stride (formerly Xenko), a free and open-source cross-platform C# game
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
CTFs as you need them
Open source library for creative expression on the web, desktop, etc.
Zig game engine & graphics toolkit