This is a version of our Music Calculator (see the HTML version page for all the details), in the much classier Widget format.
For those of you who don't know what Widgets are, you are obviously not MacOS X Tiger or (Snow) Leopard users! For the rest of you lucky people... well... here it is. Just click on the Widget icon on the left and the download should start automatically. If it doesn't, try a "Control-Click" (or right click) on the icon, and chose "Download link to...". As to installing it, well, we'll let Apple do the talking :-)

"Mac OS X 10.4 Tiger (or greater… Leopard for instance !) is required. If you're using Safari, click the download link. When the widget download is complete, Show Dashboard, click the Plus sign to display the Widget Bar and click the widget's icon in the Widget Bar to open it. If you're using a browser other than Safari, click the download link. When the widget download is complete, unarchive it and place it in /Library/Widgets/ in your home folder. Show Dashboard, click the Plus sign to display the Widget Bar and click the widget's icon in the Widget Bar to open it."