Javascript password generator

Parameter (ex: amazon.com)
Master password (your "use everywhere" password)

Generated password

This form can be used for deriving passwords from a master password and a parameter. (more info)

Like how this works? You can use it anywhere with this bookmarklet.
  1. drag the link above to your bookmark bar
  2. Click the bookmarklet from any login screen.
  3. Put in your master password, and click "submit". It will attempt to find password fields on the page and populate it with the generated password for that domain.

Long version (does not truncate password to 8 characters, for 160-bit passwords)