There are 10 repositories under map-editor topic.
A new Minecraft world editor and converter that supports all versions since Java 1.12 and Bedrock 1.7.
It's a Doom editor
A Python library for reading and writing the Minecraft save formats. See Amulet for the actual editor.
A map and tileset editor for pokecrystal, pokered, and projects based on them. Written in C++ with FLTK.
Open source toolkit for Mafia games. (Mafia II, Mafia III, Mafia DE)
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 editor and multiplayer from scratch in C
Kirby's Dream Course / Kirby Bowl level editor (C++ / Qt)
Map editor for C&C: Red Alert 2, C&C: Tiberian Sun and Dawn of the Tiberium Age.
Open source map editor in Unity, for Rust.
Main repository for Valhalla, a first-person shooter game project inspired by old school and modern titles.
Qt based tool for editing maps generated by ROS gmapping package.
N-Space: a mobile app for building 3D interactive worlds
CAMM (Crystal Alien Map Maker) open source level/map editor for CrystAlien Conflict.
Kirby's Adventure Level Editor (C++ / Qt)
Vic3 mapdata editor is an open source province editor based off Jomini.
:fire: SharpFlame: A modern cross-platform Warzone 2100 map editor based on the original Warzone 2100 FlaME map editor
A 1 week game with map editor, entity system, and GUI system written in Python and fixed pipeline OpenGL version.
Map editor for the game OpenSoldat
Fusez's Map Editor Version 3 - This is a map editor for SA:MP
The public repo of Retro FPS Studio (RFS), for educational reading and not for reuse. See license.