Produced by: Jonathan Rimmer
A 2D, DOS-based editor for both Ultima Underworld and Ultima Underworld 2, made by Jonathan Rimmer.
The program may require the DPMI Memory Manager because of the Allegro libraries that were used in its making. And, of course, the utility requires the original data files for Ultima Underworld in order to function. However, it will not work (apparently) with either the GOG or CD releases of the game; the 3.5″ diskette version seems to be required.