The Drupal Sharebar module lets you easily add a "floating" social media submission bar on your website (like that found on Mashable) that includes share buttons for the most popular social media websites online such as Facebook, Twitter, and Google +1 Buttons.
Configure ShareBar with these Social Buttons below and more:
Twitter
Facebook Like and Share Buttons
Linkedin
Google +
Reddit
StumbleUpon
Digg
Dzone
DesignFloat
Email-to-friend option
Add many others at your own discretion...
Other Sharebar Features Include:
Add, edit, and disable any buttons from social websites. Ability to add large and small buttons (small buttons are moved under the node title when the page is sized to less than "X" pixels wide if that option is used).
Order the Sharebar buttons by weight, i.e. -1, 0, 1, 2, 3, etc.
Radio buttons for enabling or disabling the Sharebar on any content type set up on your Drupal website, i.e. Blogs, Articles, and so on.