Vector Social Media Icons
by IconDock.com

URL: http://icondock.com/free/vector-social-media-icons

Note: the company logos in the icons are copyright of their respective owners.

From http://icondock.com/free/vector-social-media-icons
"Free to use for whatever purposes. If you use these icons, an optional link to
http://icondock.com would be appreciated. Thank you."