Drupal Module – Service Links is a very useful module where you can add some very common sociable icons on your page. Here is what the writer says:
The service links module enables admins to add the following links to nodes:
* del.icio.us – Bookmark this post on del.icio.us
* Digg – Submit this post on digg.com
* Reddit – Submit this post on reddit.com
* Technorati – Search Technorati for links to this post
The site owner can deside to show the links as text, image or both. What node types to display links for and if the they should show on the front page or not.