A free to play game where you raise and collect dragons. Here, you can post your dragons and eggs so they grow by being clicked on! Good luck and drag on! Link - http://dragcave.net
Ah, I see, it hasn't been active in a while. (for people preferring not to use this site's search function: http://empireminecraft.com/threads/a-simple-dragoncave-thread.21996/)
The old thread went kinda dead when I stopped hassling about getting all of the new dragons, but it still kinda lost interests as it was.. xD