The Universally Unique Password Generator allows you to use a single password for every website on the internet securely!! Simply provide the password you want to use, some string unique to the website (like its name!), and select the site's password policy from the drop down or enter it manually if it isn't there. Your password and salt (the website's name, for example) is then used to generate a unique password for the website!
Everything is done entirely on you computer, None of your information ever leaves it!