There have been bacteria discovered on one of Jupiter's moons, that counts. More advanced stuff is probably somewhere, but the universe is VERY young, so we'll probably have to wait another couple billion years until we see stuff like us. Although, there has been a planet called Gliese 581d that is in the habitable range, thought to be covered mostly by water, and it is definitely able to support life.
Ceres is another planet that could support life, it's a planet INSIDE the asteroid belt, and NASA thinks that there's an ocean underneath its surface. If that's true, it can support marine life.