RoboForm:  Password Manager
Without a doubt, this is the best utility we've ever seen or used.  You can get a free download of it HERE.  RoboForm allows you to keep passwords and other secure notes in an encrypted program on your computer.  Then when you access one of your favorite secure sites, it automatically fills in the login information for you.  It is especially good for visiting sites to sign up for something new.  RoboForm fills in all of the name and address information for you.