IconTweaker is an excellent set of icons to highlight the visual Windows background and change with style the monotonous we find nowadays.

You may substitute general icons and the ones that belong to the system and even include individual icons for the folders.

IconTweaker gives you the possibility of editing those small graphics to get a unique personalization, besides, in the author's page you will find diverse plug-ins to customize icons in a created document in Microsoft Office, support for common files and Web documents and even for some images in Adobe Photoshop.