http://topps.diku.dk/torbenm/maps.msp with Orthographic or Icosahedral projection and Lefebvre2 color map is the best I've found. (Hosted service, but there are executables to download if you're retro that way.)

Still no UWP input. Hydrosphere can be approximated by mapping to the water line input, but it lacks the full range of color maps to handle e.g. airless worlds or partially arid worlds.

(UWP + Seed -> Map is a service I'd be VERY HAPPY to see exist.)