This plugin allows site owners to reshare their content automatically on a schedule to bring new life to existing posts and increase traffic.
Plugin to share about your old posts on twitter, facebook, linkedin to get more hits for them and keep them alive.
Plugin to Buffer about your old posts to get more hits for them and keep them alive.
Plugin that automatically tweets your old posts (including custom posts) which helps you increase the traffic on your website.
WP Linkpush Buddy allows blog posters to use Linkpush services directly from their WP Add New Post form.