I am interested in a password manager that synchronizes between iOS/Android/WP7 and Windows 7. And does not require me to synchronize through or store my passwords on an online service.
Does such a thing exist?
I think the best way to solve this is by using the power of "hashing-algorithms".
The idea would be to generate a unique password of each webpage using only a secret pass phrase, and the name of the webpage and username, instead of storing a list of passwords. This way you never have to sync or store anything on the "web", but will still have a unique password for each webpage.
Given the same values for pass, webpage and username (and the same hash-function), you will always generate the same unique password. The only thing you need to rember is your master pass phrase.
As username and webpages are "unclassified" information, you can write this down on any page.
I have seen a java-script implementation of this idea, however i don't remember the name or webpage.