Plugin for user collection management?

I’m looking for a plugin that would allow me to create a database of items in which registered users on the site can then choose what of that collection they own and track it regularly.

If this could be tied in in some way to the World of Warcraft Armory, that’d be even better. It has to do with the mini pets in the game.

Done a lot of Googling but haven’t had much luck. Thanks in advance, if anyone can point me in the right direction!