MogCollector has (finally) been updated to support the new wardrobe feature. Be sure to download the latest version of the addon, and get back to collecting!
MogCollector is a tool built to assist in collecting gear for the transmog/wardrobe system being introduced in Legion. Currently, this site can be used to determine which appearances you've unlocked, and to help find those you have not yet unlocked. With time, I hope to implement more features that will further assist completionists like myself.
If you have any suggestions for site, run into any bugs, or find any items that are missing (or should not be listed) please let me know.