This plugin allows site owners to reshare their content automatically on a schedule to bring new life to existing posts and increase traffic.
Network Content Syndication Made Easy! Automatically share content by multiposting between multisite blogs.
Share pages, posts and links via SMS using Transmit SMS API
Popup to Share shows sharing buttons for Facebook, Twitter, and Google plus in a pop-up.
Toolbar to Share shows sharing buttons for Facebook, Twitter, and Google plus in a little toolbar.