PNG ICO ICNS MORE
Social media
Smooth
YOOicons Social Bookmarks
Social, button, Skype
DeepSkyBlue
512x512
PNG MORE
Social and Web Icons v2
twitter
46x46
Skype
WPZOOM Social Networking Icon Set
64x64
Vector Social Media Icons
Behance, coelho, 22x22
32x32
Social Media Bookmark
Twitpic
Twitter Icons
Chat, talk, twitter
128x128
twitter, Bubble speech
Web social icons
Vimeo