From Siber Systems:
Pass2Go memorizes and securely stores your online and offline passwords, so you will never forget them again. It automatically logs you into online accounts and completes online registration and checkout forms with one click. Pass2Go works directly from USB key (or any portable drive), without need to install it on a client computer. Pass2Go gives your passwords and other personal data complete security (strong encryption provided), portability (pull it out from one computer and plug into another), and complete manageability (print list of passwords, back up and restore). Pass2Go is a portable (no-install-required) version of RoboForm password manager and form filler.