Auto login script

Let's call the site I need [login to view URL], a site where you can store your sites, usernames and passwords so you can enter them with a single click. Here's how it should work: User registers User gets email to confirm registration Once logged in, user enters urls for other sites where they are members User also enters user names and passwords for these sites User sees list of their registered sites as links Clicking the link loads that particular site in logged-in state I will supply wireframe and more specific requirements document.