Social networking sites like Facebook and Twitter are now one of the most important e-commerce advertising tools. Today sharing on social networks is replacing the old word of mouth. It is getting more important each day to enable your customers to share your products on their social network profiles, making your customers your best salespeople.
Here is a simple module that displays a like and tweet buttons just below the "add to cart" button on category pages. This module will display these share buttons for each product, so that your customers don't have to visit the product page to be able to share it.
And if you are looking for a more advanced module where you can modify the layout, the look of the share buttons you can check my commercial module Facebook Like & Comment, Google +1 and Twitter Widgets. More than just share buttons, this module has the facebook comment and activity boxes as well.