I have developed map-making software (MapForge, recently released) that is intended to make maps for print or for use in virtual tabletop software. It supports content Add-Ons (free or paid), but only ONE of the 50 current Add-Ons are specifically Sci-Fi genre.
I'm currently trying to address this shortcoming by producing a slew of new mapping content Add-Ons, 14 of which are to support the Sci-Fi genre. If successful, I believe this could make MapForge the go-to app for sci-fi map-making. Is there much interest in this sort of thing?
I want to note, however, that all the new Add-Ons would be for Personal Use Only (no publishing or commercial use).
The only sci-fi Add-On at the moment that can be used in commercial/published projects is this one.