This module will help your users to share your webpage with others on their facebook wall, or tweet it. You can also use the other options available.
Search Engine Optimised XHTML
The module is made to output semantically correct and valid code. This would help you retain your good search engine rankings.
Easy to Setup
The module params are self explanatory and very easy to use. you just need to publish the module in a standard module position, and configure the options to style it as needed.
The css is organised very cleanly if you would want to style the module to your site's theme.