[development] Where to find free icons?

[Darrel]

I'm working on a bunch of file specific stuff, and I've been trying to 
do some little things to spruce up the file forms. One thing I've done 
is add a filetype icon... I borrowed some from PHP File Navigator 
(http://pfn.sourceforge.net). I'm not sure if their licensing allows me 
to use them, and I want to avoid any possible license conflicts... Can 
anyone recommend a place to find freeware icons for filetypes... 
preferably as images... all I keep finding are .ico's....

.darrel.