FREEThis app allows you to block search results from Google, Bing, Yahoo, Ebay, and Criagslist (with more to come). If you block on one of the sites, it will block on all of them.
FREEThis app adds "Send buttons" to every site on the internet. On certain sites, it will add more than one per page. It will appear in the Top-Left corner of your browser. The Send button allows you to send the article to your facebook friends, or you can even enter an email address (in case you want to share with someone not on your friends list). To me, the Send button is much more useful than the Like or Share buttons. So please, start Sending.