Pokémon Save File Editor
Injectable LUA scripting system, SDK generator, live property editor
Galgame's Multilingual Real-time Machine Translation Tool
The source code to VVVVVV
Flexible level editor
Cross-platform, open source, and super fast MUD client with scripting
Lightweight console for Minecraft chat and automated scripts
The flexible game engine
RPG Maker 2000/2003 and EasyRPG games interpreter
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
A dead simple 2D game library for Go
2D game development library for Ruby and C++
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A game framework written with osu! in mind.
An open source flight dynamics & control software library
Eureka is a DOOM map editor
A cross-platform, open-source, pure C game engine for mobile game
This is a Units Editor for Empire At War which will make things easy.
An elegant Go board and SGF editor for a more civilized age
A very efficient tutor.
Chess Database and PGN viewer
Every creative journey starts with Unity Hub
A cross-platform port of Hexen II game.