If you have ever had a quest item you have no idea which quest it belongs to, and if it safe to destroy, this AddOn is for you.

QuestItem stores an in-game database over quest items and tell you which quest they belong to. Useful to find out if you are still on the quest, and if it safe to destroy it.

QuestItem now has a configuration screen you can access by typing /questitem or /qi at the chat prompt. Here you can configure some of the functionallity as well as do manual mapping of unidentified items.
If you've made a mistake with a manual mapping, you can change it by holding down the Shift key while clicking