EquipCompare
EQCompare **Not recommended as the author hadn't updated it in 2 years - it was fan updated to work, but from what I understand, still has some problems. I haven't used it, just what I gathered from reading the comments.
I personally have tried to move away from Tek's addons, although they are great, I can't stand his "internet persona/attitude" of ****iness, which is a personal thing I know.