So, here's a couple moons!
Titan, largest moon of Saturn:
Source for map one and map two.
Io, innermost of Jupiter's large moons and most volcanically active body in the solar system:
Europa, next of Jupiter's large moons, with a skin of ice covering a sub-surface ocean:
Ganymede, third large moon of Jupiter, and largest moon in the solar system:
Callisto, Jupiter's most distant large moon, with one of the most cratered surfaces in the solar system:
Enjoy! If you have other moons you would like to see added, let me know and I'll see what I can do!
Update: At your request, I'll be adding some additional moons below.
Enceladus, Saturn's small but surprisingly active moon with huge space geysers!
Mimas, Saturn's "Death Star" moon (unfortunately I can't capture its geoid or topographic relief ... yet).
Iapetus, Saturn's starkly two-toned moon (this animation does not capture its equatorial ridge).
Triton, largest moon of Neptune. The map of Triton remains incomplete (our only high-resolution data is from the 1989 Voyager 2 flyby), so I focused this render on the hemisphere that was mapped. I say we go back and finish the job!
Enceladus, Mimas, Iapetus, and Triton maps all sourced from here.
Finally, here's a moon-sized (smaller than both Ganymede and Titan) planet - Mercury! I combined a partial enhanced-color map with a more complete black-and-white map to fill in the gaps.