You Looted A Quest Starter Item
This addon will notify you (very annoyingly if you want) that the item you just looted starts a quest.
/nyi a - toggle annoying mode (more notifications.) /nyi ua - toggle ultra annoying mode (massive spam, you won't miss this one.) /nyi r - reset item cache (the addon will only notify you once per item, reset the cache with this.)
The addon will use MikScrollingBattleText for the notifications if you have it installed.