Open Source Icons
I've pulled together various icon sets that are open source and free for use.
37 Signals
Description: Very small set of vector icons from
here.
License: Completely free
Attribution Required?: No
Download from: http://tedwi.se/u/92
Silk
Description: Huge set of small 16x16 icons from
here.
License: Creative Commons
Attribution Required?: Yes
Download from: http://tedwi.se/u/94
Crystal
Description: Large set of icons ranging from small sizes to high resolution from
here.
License: LGPL
Attribution Required?: Yes
Download from: http://tedwi.se/u/95