FindIcons is a icon search engine that helps you find free icons. You can download the icons in 3 ways: ICO, ICNS and PNG and you cand convert the icon in popular image formats such as: BMP, JPEG, TGA, EPS, PSD, TIFF, GIF and SVG. If you are a icon desinger you can upload you work, to promote your icon works to all designers.

I tried and I liked it.