I use these brushes I made. You can cut and save as “brushes” on GIMP. Inkscape would be better for “lines”, but since they are so small on maps they dont’t have to be perfect, you can draw your own brushes on Inkscape and then save later on GIMP.
We are still working on it, names come from http://donjon.bin.sh/random/#town, cities description is based on this site’s random generations. Many other random tables are used to determine diplomacy, population, commerce, army, war attitude. 12 more words