Thanks to MacDailyNews for the heads up :
Koloroo today announced the release of the first widgets that run on any iPod with a color screen. TipKalc is an easy-to-use tip calculator with instant check-splitter and KolorWheel is a color utility that provides scientifically formulated color schemes to match a web page, home decor, shirt or outfit ... in fact, just about anything. Both widgets can be loaded onto an iPod from either a PC or Mac and are available at an introductory download price of only $4.99 and $7.99 respectively.
More info: www.koloroo.com
My take : now I can start developping an OTDR for the iPhone platform.