iColorFolder, which is included in WinOSX, is the little tool that allows to change the color of Windows XP folders. It has been posted only on Aqua-Soft forums, but I noticed that many people were redirected to WinOSX website when looking for iColorFolder.

It has now it own website, hosted at http://icolorfolder.sourceforge.net. Juste to have a clean presentation page instead of old forum posts...