Have you found any? It's an integral part of all games nowadays. I just found out this exists http://www.youtube.com/watch?feature=player_embedded&v=iNw2YcAK9Wc It's a fountain of cats.

ADeadlyFish has found a multiplication glitch for flowers/sapling, this is how it works, first place a block and then put a pot on it, and then plant the flower/sapling and break the block under it. Now you have 2 flowers.