Symantec offers downloads of its Norton Identity Safe for Windows and Mac, iPhone, iPod touch, and iPad, or Android for free. That's the best deal we've seen on this password management tool. (Comparable software has cost as low as $20 for PC and Mac and $7 for mobile apps in previous deals.) It keeps your passwords synchronized across different computers, browsers, and mobile devices while storing your passwords and other information in a secure, cloud-based vault. Deal ends October 1.
Update: Note that Mac OS X 10.7 Lion is not supported.