Pokes plugin give your users a Fun, Simple and Quick way of initiating a conversation. Users can easily get Attention of other users using this plugin.
Favorite Plugin similar to Twitter Favorite allow your members to keep track of their favorite items such as Post, blog, News, Music or Video. Real Time Notification when members favorite item.
Sitemap is a tool that inform search engines about the structure of your site. By placing a sitemap on your website, you enable Search Engine crawlers (like Google) to find out what pages are present and which have recently changed, and to crawl your site accordingly. You don't have to manually submit sitemap as it automatically (if settings is enabled in the admincp) Notify Popular Search Engines (Google, Bing) when sitemap changes.