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Password Safe has a portable versiona, PasswordSafe2Go.
There is also PasswordSafe for U3 (still supported, but no longer available).
Pro Great user interface on Mac and iOS
Since the passwordSafe is essentially an open standard multiple people can use to develop apps. The http://pwsafe.info/ apps for Mac and iOS are really excellent (paid) management options.
Pro Anyone can verify the code since the software is open source
Anyone can review the code.
Con No official browser integration
No browser plugins available.