Icons for GUI development

[Yu-Xi Lim]

Benjamin wrote:
> I'm developing a mail client. Since GUI are usually improved with some
> icons, I'm looking for some. Because I'm not a very gifted artist I'm
> searching for a library of GPL or public domain icons. Any suggestions?
> 

I frequently use the Crystal icon set.
http://www.everaldo.com/crystal/


Also, a page of links I encountered recently which may help you:
http://www.snap2objects.com/2007/06/06/85-killer-resources-every-designer-should-know/