LastPass Password Manager
LastPass is the last password you will ever need. It allows you to: Create strong passwords, knowing you only have to remember one.
LastPass has addons for: Internet Explorer, Firefox, Safari (for Mac), Google Chrome, and works with other browsers with Bookmarklets (e.g. Opera). LastPass uses Host Proof Hosting techniques to synchronize your passwords all while LastPass never has access to your sensitive data. LastPass offers a premium upgrade as well for mobile access on iPhone, BlackBerry, Windows Mobile, Google Android, Palm webOS, and Symbian phones.