PNG ICO ICNS MORE
Desktop apps
Smooth
Google Buzz icon kit
drink, google, web20
Black
256x256
inside, Buzz, google
Buzz, google, user
google, webdev, Buzz
Buzz, google, webdev2
Nature & outdoors
Green Pack
garden, nature, green
Social media
Inside
inside, Blinklist
inside, blogger
Delicious
Digg
Feedburner, inside
inside, Favorites
inside, flickr
g, google
Picasa, inside
Blue, cracked twitter, twitter
netvibes
Matteus, Orkut
inside, Reddit
Stumbleupon, inside
Tuenti
Ping show, Social, youtube
3D
blogger, web20, drink
Drink web 2.0
web20, Delicious, drink