ul.timate.info
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ul.timate.info is a Mozilla Firefox Add-on that aims to simplify the way people interact with social network sites including Twitter, Facebook, MySpace and FriendFeed.

ul.timate.info was created to cut down on the number of clicks users need to get things done. Things like follow users and post from multiple accounts on Twitter, send messages and write on someone’s Wall on Facebook, add comments and view friends’ friends on MySpace and even subscribe to users’ feeds on FriendFeed. There’s even a command line interface (a.k.a a terminal) for harder core users. In total, v.0.4.1 of ul.timate.info has over 100 features bringing contextual functions directly into the browser for the most popular social sites.