Keepass Password Safe is second to none. The free password manager is open source, secure and easy to use. On top of that is Keepass a very capable utility which has import/export functions, drag & drop functionality, a random password generator and so much more.
The software comes in four editions which are all free. For instance, the latest portable build (2.07) supports Windows 98 to Vista including 64-bit, Linux, Mac OS X, BSD etc. Yes, of course can you run the Keepass Password Manager from your USB stick: the software is only about 3 MB in size.
Among the vendors of free password managers software Keepass, which exists some years already, has probably the best reputation - in stark contrast to many competitors who are ‘no names’.