1)   Flock The Social Web Browser 1.1.4
Flock is the social browser. Building upon Flock’s previous version, which was reknowned for great blogging, media and RSS, you can now monitor your friends from Facebook, Flickr, Twitter and YouTube.

 2)   40Twitter 1.0
The software runs in the background and periodically reminds you to update your status on Twitter. With the click of a button you can update your status directly from within 40Twitter. You can even choose how often 40Twitter reminds you.