"Genericons" have been offered by Automattic, who most know as the people behind WordPress. They're free, GPL, and vector. And although they have a lot of the usual suspects in the current collection of a little over 50, there are some others that are pretty stylin'.
If you aren't familiar with using icon fonts, you should look into it because they're great. Lightweight, scalable without problems, you can add gradients and colors to them, animate them...the list goes on.
Anyway, here's the link to Genericons from Automattic: http://genericons.com/
Here's some further information about them: