MUDMapBuilder is .NET library for generating map images for MUDs.
You feed it a simple json file describing an area, and it'll automatically place all rooms on the 2d grid and generate a png image.
Only MUDs with 6 directions(east, west, north, south, up, down) are supported.
Detailed instructions on how to use it are here: https://github.com/MUDMapBuilder/MUDMapBuilder
The utility was used to generate maps and eq lists for multiple open source MUD codebases that are listed on this page.