What planet has water except earth?

There are no other planets in THIS solar system that are naturally ready to support human life. Which isn't to say that this will always be the case; we can easily settle on the Moon and Mars because our technology allows us to create human environments where there are none now.

And it may be possible to terraform even Venus or some of the Jovian moons to the point where they would be habitable.

Beyond our solar system, the Kepler space telescope has located 1200+ candidate planets; other stars with satellites which seem to occasionally pass in front of the star and block its light. We cannot yet know if any of them are even REMOTELY habitable; based on their sizes, it's likely that none of them are. But such a high rate of planetary discovery SO EARLY IN THE PROCESS seems to indicate that planets won't be as rare as some scientists believed; it may be that many, perhaps even most, planets will have solar systems of their own.

It is practically certain that some of those planets will be earth-like, or at least, close enough to be terraformed into someplace where we could live.

Water; we know the Moon has ice deposits in deep craters near the south pole. Mars has ice, and has frost; in fact, the Mars "Phoenix" lander was probably destroyed when too much ice formed on the solar panels and broke them. Photos of the Jovian satellite Europa indicate that there are cracks and ridges in the surface; computer moDELLing suggest that these may be cracks in an ice-covered ocean, and the ridges form when water splashing up the fissures re-freeze into ridges. Some of Saturn's rings may contain chunks of water ice.