I found this randomizer for all the various mounts and pets that I have and like it.
http://www.wowace.com/addons/pokedex/
A nice feature with it is that you rank your pets & mounts so that ones you like will appear more often. It also has a Hot Item where something new you get or like more than anything else will appear much more often for a time so you don't have to keep readjusting your rankings whenever you get a new pet/mount/title.
I don't use the title changer so much but nice to have.
To use the addon, it's easiest to make a macro for it.
/cancelform
/pd togglemount
Druids should use the /cancelform so that if you are in a form already, it will force you out of form so you can mount up.
The pet one is just
/pd tc
Enjoy!