Resource – Web Application Icons
pinvoke has some neat icon packs to use in your web projects, called Fugue and Diagona. All they are asking for is a link back, or a modest price. The fugue icon pack, pictured above, has over 2000 icons in it, the diagona icon pack 400 of them.
All icons are easy to read and look nice, while the diagona icons are a bit more simplistic than the fugue icons.
Go check them out.