Social Bookmarking - Social Sharing Plugin


I wanted to know that is there any "Social Bookmarking - Social Sharing Plugin" available for ELGG ?

If not, than please can someone help me in developing that?

Because it is very essential in today's e-business, that you share every unique content of your website on big social networks to attract more and more users, that will increase page rank and traffic and will also help in seo.


Please someone help me out.

If this plugin is not available kindly help me how to start developing plugins for ELGG I shall be happy to work for all of us and ELGG specially.