Project Icons is a pack of 130 icons and 3 icon badges. These icons are 32px only. They are available in png, ico, icns and pasted icons. The badges are available in png only. These icons are licensed under a Creative Commons Attribution 3.0 license.
Bogdan Mihaiciuc is trying to update this set often, so if you want to be notified of future updates, you can follow him on Twitter.
License: Creative Commons License