Most useful dashboard widgets

Better than keeping my normal constantly thrown out scrap of paper on my desk, I found

http://www.apple.com/downloads/dashboard/business/lists.html

which is a dashboard widget for keeping lists. It's very basic, which is all I need! But how do you edit something once you've written it? Hmmm, well, it doesn't matter too much I suppose.

The other Mac OS X widgets I use are

http://www.liquidx.net/albumartwidget/ which downloads my iTunes album covers from amazon in the background, automatically

http://www.phantomgorilla.com/widgets/ to get BBC radio stations (heaps of them I didn't even know existed)

the excellent currency converter widget that updates without you pointlessly having to press 'convert' (that button doesn't exist in this lovely program)
http://www.palple.net/widgets/currencyconverter/index.html

plus the standard calendar and clock widgets and the truly superb scientific calculator widget with memory (in fact full Javascript expressions it seems)

http://www.brackeen.com/calculate/