Ultimatrix is a fan-made utility for the Ultima games created by Xenerkes Dragon. It allows the user to view, edit and create maps for the initial Ultima games from Ultima I up to Ultima VI, and also for Martian Dreams and The Savage Empire. Its first version, 0.1, was released in May 2000, and its last version, 0.29, was released in October 2001.
The program loads up in the overworld of each game, but it is possible to open other game maps. The program runs as a command line utility, but an optional Ultimatrix GUI may be used for easier handling.