PNG ICO ICNS MORE
Social media
Smooth
Email, envelope, open
WhiteSmoke
48x48
Social, Delicious
UI
Function icons
Blinklist
Delicious
Digg
Feedburner
48, flickr
google, button
Lock, Unlock, open
navigate
Ask, help, questionmark
Reddit
Comment
Stumbleupon
File, bird, button
yahoo