This page needs some work... Well, a lot of work!
By the way, those are the leatherworking patterns that i've learned in my journeys across the world of Azeroth.
Leather items (Armors for druids, rogues, hunters (up to lvl 40) and shamans (up to lvl 40))
Mail items (Armor for hunters (from lvl 40) and shamans (from lvl 40))
Cloth items (Just some cloaks, the most notable one is the Hide of the Wild)
Trade goods (Leathers and hides)
Ammo bags (Quivers and ammo pouches)
Other items (Mostly armor kits)
Missing (Patterns that i've heard about but that i've not been able to learn yet. This list needs to be updated with TBC patterns.)
My CTProfile: http://ctprofiles.net/206432