I presume (without confirming this) that the entire asteroid belt too largely goes around the sun the same way. It would be interesting to know, though, how many (if any) rogue asteroids or comets have been discovered orbiting against the flow. The closest any planets come to deviating from the rotational direction around the sun is that some (Pluto and Mercury) have orbital planes at significant angles off of the ecliptic. But they are still much less than right angles (perpendicular), so they still can’t be said to be orbiting backwards.
Uranus does have a planetary rotation that is nearly laid over on its side (97.77 degrees) from its orbital plane. So it could almost be said to have a “backward” planetary spin – but it is more at a right angle than it is backward. Compare that with earth’s 23.5 degree axial tilt which already gives us our seasons, and you can see how uniquely extreme Uranus is in that.
According to the wikipedia entry on retrograde and prograde motions, there are many comets in retrograde orbits (to begin to answer my own question above). Also, Venus has a retrograde rotation (not to be confused with orbital direction). It is interesting that nearly all moons also orbit the planets in the same way as the planetary spin (which means also matching their orbital directions --Uranus and the moonless Venus being excepted of course.) And Uranus’ moons are prograde to Uranus rotational spin (matching the planet’s rotational motion rather than its orbital direction). Triton (of Neptune) is one of the larger exceptions that orbits in the opposite of Neptune’s spin (and the sun’s). So that makes astronomers theorize that Triton was a captured moon rather than formed in its present locale.