Awesome
anki-addons
Some Anki2 add-ons in different states of usefulness and bugginess.
See http://ospalh.github.io/anki-addons/ for a full list.
The more useful include:
Colorful toolbar
Give Anki2 a bit of the Anki1 look with a bunch of colorful command buttons.
Add note id
Make all notes unique.
Download audio
Download audio from several sources
Deck name in title
Guess what that one does.