Free Icons: Woven Fabric Social Media Icon Set - @dawghousedesign
Free Vector Icons: Panda Social Network Icons - @sixrevisions
3D Social Media Icons for bloggers - @snap2objects
Free High-Resolution Social-Media Iconset – PriceTag Style - @deepubalan
Christmas Special - Free Social Networking Icons - 1 - @cheth
Simple & Bold Social Media Icons - @WooThemes
Designing Social Interfaces: Overview and Practical Techniques - @SmashingMag
5 CMS ready for social networking site - @blogfreakz
25 Social Bookmarking Resources Every Designer Should Know - @WebMagz
Sleek! Free Tab Style Social Icons - @cheth
Free Social Media Icons: Old Bottle Crowns Icon Set - @sixrevisions
Free Set of Social Media Icons – Large Icons Social - @sixrevisions
