Well here's a few. Can't remember offhand where I got them, but google should point you in the right direction...
ChatEdit:
used to be useful (as I could copy text from there and paste into Google translate when I got stumped) but now it doesn't seem to work - possibly after the last update.. now it just ends up pasting garbage. Perhaps just my machine, perhaps due to the last update - not sure.
TrinityBars:
Love this addon for configuring UI bars and saving configurations etc
AlphaMap:
Didn't like it to begin with, but is useful at times.