http://www.youtube.com/watch?v=Yco1deXOzN8 U! S! A! U! S! A! Warning, profanity at the end.
https://bugzilla.mozilla.org/show_bug.cgi?id=97284 It's not a bug, its a feature: paste "javascript:document.body.contentEditable='true'; document.designMode='on'; void 0" without the quotes into the titlebar of any page (in Firefox) and you can edit the page as it appears on your system as if it were a text document.
http://dbhovel.com/Extras/MuseOn.aspx MuseOn is a visualizer plugin for Windows Media Player which attempts to guess what chord is being played in the current song.