For random pets and mounts, take a look at GupPet.
The author kindly added in a user's suggestion of pet/mount drop info right into the tooltip
You can also have it randomly auto summon a pet, random mounts, and it also has a very nice database of all the known pets and where they are from.
http://www.wowinterface.com/download...56-GupPet.html
Enjoy, lol.