Social bookmarking
To add a social bookmarking button to your site like this one below then simply sign up at addthis and select your button style, copy the code given and paste into a new 'custom HTML' box.
NOTE; on my site it added nasty text at the top and bottom of the button. To remove the text, open the HTML editor again and delete at the start of the code and at the very end of the code. then save and publish.
NOTE; on my site it added nasty text at the top and bottom of the button. To remove the text, open the HTML editor again and delete- (AddThis Button BEGIN -->) at the start of the code and - (AddThis Button END -->) at the very end of the code. Then save and publish.