Sharing shortened URL's: With twitter and fb, and looong links i's very useful to share shortened links. This one shortens links right from your browser. Cannot get any easier. Like the urls below :) This also does other things like keeps a track of how many people clicked on this link basically telling u how popular it became. (but all that aside..the basic URL shortening is SUPER EASY)
Proxy Switcher: Too awesome cannot live without it. one click to switch between proxies. Also configurable rules, like youtube always opens in xyz prozy etc.
http://j.mp/mnsZ8F
FB Blocker: yeah its lame, but I am bordering on addiction to social networking. not really addiction but it is a distraction. So I use blocker in office hours
http://j.mp/im0sO5