The Inner Sphere is a commandline tool for creating maps of star systems in the BattleTech setting. It has a data set based on the Sarna Unified Cartography Kit, but can take custom tables of planet coordinates and faction ownership. It also supports a range of settings to control the presentation of the map.
Here are a couple of example maps generated with the program.
The source code for this project is located in the
free-worlds-tech/the-inner-sphere
repo.