OK, development on this tool has stopped quite some years ago, but it is a great little helper to create nice buttons and shapes. The author is german, but the software is in english.
Download page: http://www.steffengerlach.de/freeware/Zpaint homepage wrote:Forget your button maker! This software for creating 3D-looking elements for websites and software interfaces is much more flexible. Easily paint raised or lowered shapes such as buttons, rings, boxes... or add those effects to existing graphics. Color/texture selection, adjustable extrusion depth, gloss and other effects.