Password generator

Here is a page that has a bookmarklet that will generate a password for websites, given a master password. This is how it works:

It gets the hostname from the page's URL and mixes it together with
your personal master password using a little cryptographic magic we
call MD5.
It will always get the same result if given that hostname and master
password, but will never get that result if either changes. (Well, once
in a few billion times it might.)