You can click on the Google or Yahoo buttons to sign-in with these identity providers, or you just type your identity uri and click on the little login button.
Graphity is a fully extensible generic Linked Data platform for building end-user Web applications.
A live demo can be found here
cf. http://semantic-web.dk/presentations/LEDP2011.pdf and http://www.w3.org/2011/09/LinkedData/ledp2011_submission_1.pdf
Comments
cf. http://semantic-web.dk/presentations/LEDP2011.pdf and http://www.w3.org/2011/09/LinkedData/ledp2011_submission_1.pdf