tilesets topic
MapEditor
You can draw your map using by this Map Editor project.
godot-tiled-importer
Plugin for Godot Engine to import Tiled Map Editor tilemaps and tilesets
Portal
Quantized Mesh Terrain Data Generator and Server for CesiumJS Library
map33.js
A JavaScript library to make 3D maps with three.js.
tiled
Flexible level editor
tilemap-studio
A tilemap editor for Game Boy, Color, Advance, DS, and SNES projects. Written in C++ with FLTK.
slate
Pixel Art Editor
porymap
Map editor for pokeemerald, pokefirered, and pokeruby
polished-map
A map and tileset editor for pokecrystal, pokered, and projects based on them. Written in C++ with FLTK.
VersaTile
A simple 3D model editor based on simple quads and a sprite set.