Send to Notepad
Although I can see that this could be a useful application, I wish it had a few other usability features. For example, the ability to paste to Notepad using a shortcut keystroke would be useful. Also, it should be able to detect when you've got text highlighted, negating the need to actually copy the text to the clipboard before firing off the Send to Notepad functionality.
Even still, this could be a useful utility to have in your arsenal.
Note: I had difficulty viewing the Send to Notepad site in Firefox; for some reason it didn't detect that I had the Flash plugin installed. It opened fine in an IE Tab in Firefox, though.