LootDB adds loot information to the standard item tooltips. Therefor it extends the tooltips by a few lines, showing in which instance and by which boss an item drops. It also includes the droprate, items gained for honor, arena points, badges of justice or spirit shards.
LootDB is currently available in english and german. The library is prepared for further translations.
1) get on IRC. Freenode, #WoWUIDev and #dongle. We like the addon but we need to beat a little sense into you
2) Push up a copy to www.github.com. Then we can fork your work there, make improvements, and you can easily pull in our changes.