If you don't want to bother signing up for a site to gain access, there's no need to visit anonymous login sites. BugMeNot takes care of that for you, providing multiple credentials with just a click.
BugMeNot has now come to Chrome. It lives in the omnibar and shows up on account login screens. It automatically detects where you are, and clicking it's icon or pressing Control + I will automatically fill in the login and password information for you. For logins, you'll be able to choose from a list and each will have a percentage next to it that will show you how successful the credentials have been. After a successful or unsuccessful login attempt, you can report the results through BugMeNot to help keep the feedback up to date and accurate.