From the description of konfabulator:
What sets Konfabulator apart from other scripting applications is that it takes full advantage of today’s advanced graphics. This allows Widgets to blend fluidly into your desktop without the constraints of traditional window borders. Toss in some sliding and fading, and these little guys are right at home in Windows XP and Mac OS X.
The format for these Widgets is completely open and easy to learn so creating your own Widgets is an extremely easy task.
For the “skinning” crowd, Konfabulator is a dream come true. You can easily change the look, feel, layout, even functionality of a Widget so that it matches your lifestyle, your desktop, or the pants or skirt you have on that day.”
Maybe the reason the widgets are so handsome is because many are designed for the Mac.