WSI let's you invite your social friends to the site
Spam Master is the Ultimate Spam Protection plugin that blocks new user registrations and post comments with Real Time anti-spam lists.
Plugin that add a share to friends jQuery Lightbox
EGW CSS3 transitions Animation Social Social share buttons display on post or page or custom post,It show lite share button only with html & CSS3.
Easy sharing and connecting on social networks. Display on posts or use widgets or shortcode. Also Twitter name/hashtag to link converter.
This plugin will provide your site with a unique possibility to viral spreading the news you provide on social networks such as Twitter, Facebook, Lin
Adds a tell a friend, Share/Bookmark/Email/Social Bookmarking button.
Social Buttons for your website and Auto-Publishing of content to Social Networks.
This plugins makes possible for your readers to share pieces of content from your site in the following social networks: Facebook, Twitter, Orkut, Del
Adds a 'Share This Post' button after each post. The share botton supports e-mail address book, social bookmarks and favorites.