Useful Tools (and Cool Stuff)

Every once in a while, I find and/or write some tool that makes life easier for me in one way or another and add it here. Plus, sometimes I find some cool snippets of code and figure, "Why not put 'em here?" I'd appreciate any you may have, by the way.

How does your electricity consumption compare to Al Gore's? Check out The milliGore Calculator!
You should be using SuperGenPass to make "passwording" easier online. For a guarantee of security, I'd recommend the mobile version which has also been implemented for the Blackberry!.
Keep up with Woot's current deal
Hide your email address from spam bots
Encrypt your web documents with simple (but weak) web encryption
Stream MP3s over the Internet
Automatically write and scroll text in a textarea HTML form control
How to beat telemarketers at their own game (soon to be added, but you can take a look at an old version)
The Power of Compound Interest (soon to be added, but you can take a look at an old version)
The Extended Euclidean Algorithm (soon to be added, but you can take a look at an old version)