Twitter Login Module For Pligg allows users to login to your Pligg site using Twitter Account. When a user logins using Twitter account, a user is also registered in your site.
What is Twitter Login?
Sign in with Twitter is the pattern of authentication that allows users to connect their Twitter account with third-party services in as little is one click. It utilizes OAuth and although the flow is very similar, the authorization URL and workflow differs slightly as described Here.