forrst icon http://forrst.com/posts/Forrst_Vector_Icon-iuE

http://icondock.com/free/vector-social-media-icons
github https://github.com/about#media_downloads
http://stackoverflow.com/content/stackoverflow/img/apple-touch-icon.png

http://meta.stackoverflow.com/questions/32755/icons-for-stack-overflow-and-super-user-for-prism-windows-7-pinned	READ !!! http://stackexchange.com/legal/trademark-guidance !!!!!