Palaround - Meet people you should be friends with.
Epic Pen - A windows tool for drawing over your desktop and applications
Digg - Digg delivers the most interesting and talked-about stories on the Web right now.
gInk - An on-screen on-screen annotation software for Windows.
quippd - quippd is a social news site that anyone can edit.
Gromit-MPX - Create annotations by directly drawing on your screen.