Flexible level editor

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 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 Amulet for the actual editor.

A map and tileset editor for pokecrystal, pokered, and projects based on them. Written in C++ with FLTK.

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.

Map editor for C&C: Red Alert 2, C&C: Tiberian Sun and Dawn of the Tiberium Age.

XYZ Maps is an open-source map editor written in TypeScript.

A DOOM and Duke Nukem 3D style game with ray-casting, featuring a level editor and multiplayer from scratch in C

Qt based tool for editing maps generated by ROS gmapping package.

Open source map editor in Unity, for Rust.

Kirby's Dream Course / Kirby Bowl level editor (C++ / Qt)

Main repository for Valhalla, a first-person shooter game project inspired by old school and modern titles.

N-Space: a mobile app for building 3D interactive worlds