LDtk

MICRODEM is a freeware microcomputer mapping program written by Professor Peter Guth of the Oceanography Department, U.S. Naval Academy. MICRODEM displays and merges digital elevation models, satellite imagery, scanned maps, vector map data, and GIS databases.

VersaTiles is a fully open-source stack for generating, distributing, and using map tiles from OpenStreetMap data, eliminating the need for combining multiple tools. Featuring a four-step, customizable process chain, it allows flexible integration of different tile sources, servers, and frontends.

editor that uses the Ink narrative scripting language and allows you to play and test your interactive (game) narrative stories on the fly.