I have created a set of 56 icons for social networking websites (more or less) in a vector format.
The icons come in dark grey (#444444), light grey (#808080), and blue (#009BCD). This collection currently has icons for Twitter, App.net, Facebook, Dribbble, Instagram, and more.
This work is licensed under the MIT License.
The logos of these companies (or likenesses thereof) are the property of their respective owners.