InstaNotes
InstaNotes is a very cool, free site I just learned about today from the developer, @studyers, that allows you to take simple notes in your browser window and then you can email them out after. It uses Facebook to login.
This would be a great resource for students who are on a school or shared computer and need to take notes. When done, they could just email their notes to themselves, or anyone else, and they are done. No software to install.