Since the PrePatch gave us a whole new toy of the transmog variety, there are a lot of addons being created. Here are a few of the very useful ones!
Legion Wardrobe -by ykilgor – offers a variety of improvements to the Blizzard UI and also will tell you if you have an appearance.
Transmog Tokens – by Kruithne – allows you to see based on a tier token if you’re missing any appearances available for purchase with the tokens. Fabulous since many alts had a variety of tokens sitting in their bags!
The next two I found today based on twitter recommendations I happened to catch. I’d credit those who recommended them as well but I cannot remember who did. I’m in the process of playing with these addons now and they seem really good!
mOnAr’s Wardrobe Helper – by qmOnArq – Shows what you’re missing by instance [I HAVE BEEN LOOKING FOR SOMETHING LIKE THIS YAY!]
Caerdon Wardrobe – by Caerdon – Makes seeing what you have/don’t have more visual.