[terhechte]

My plants, so they can tell me when they're thirsty, need more sun, need less sun, hungry (i.e. minerals + water), whether they have a bug, whether the room is too hot, too cold, or whether the room is too humid, or not humid enough.

[Xlythe]

Doesn't do quite everything, but it is a start:

http://www.parrot.com/flowerpower/us