Flexible level editor
A new Minecraft world editor and converter that supports all versions si...
It's a Doom editor
Thunder Engine – Cross-platform 2D and 3D game engine with modular archi...
A Tool to Help the Creation of Warcraft III Map
Map editor for pokeemerald, pokefirered, and pokeruby
A Python library for reading and writing the Minecraft save formats. See...
A map and tileset editor for pokecrystal, pokered, and projects based on...
Online collaborative map editor for role-playing games.
Open source toolkit for Mafia games. (Mafia II, Mafia III, Mafia DE)
2D platformer engine using LÖVE and Lua
Tile / Sprite / Map Editor
A BYOND language smartness provider, map renderer, and more.
A DOOM and Duke Nukem 3D style game with ray-casting, featuring a level ...
Kirby's Dream Course / Kirby Bowl level editor (C++ / Qt)