Pashword

Generate unique passwords for every account of yours with one secret phrase.

This is based on the idea here: http://pragmattica.wordpress.com/2009/04/30/password-hashing-a-neat-idea-that-can-help-to-protect-your-online-accounts/

In a nutshell, this app allows you to use one secret phrase, which you must remember, to generate unique, difficult to brute-force passwords for every account you have. The app requires absolutely no permissions because nothing is ever saved, other than the account phrases you use to generate the hash passwords.

A Google Chrome extension that has the same functionality as this app is here: https://chrome.google.com/webstore/detail/unobtrusivepasswords/oloklipnlbjjjbpggeeijidknkmnjhje?hl=en