Passwords are surrounding us, thousands of websites are asking us to register every day. At some point we tend to loose control over them and start either using the same password everywhere or escape to a password vault solutions. Many of you are building new websites almost every day and you often you need users to log in. Don't create your own password storage in that case. Save your users from the need to create and remember yet another login and password, and use one of the existing identity providers. It can be Live ID, Facebook, Google, Twitter, Yahoo or many other and you can choose one of them or all together.