Integrated web: Ubiquity
Damn Ubiquity is cool. Just take a look at this . Ubiquity is a mashup tool for Firefox. A very simplified description what it does is a cut and paste tool that understands meta data. If you mark an address and say map it you get a map over the address and can insert it into an e-mail. You can mark text on a page and get it replaced with in the page with an translated alternative.