SocialTwist Tell-a-Friend
This module makes available the SocialTwist Tell-a-Friend widget for Drupal for FREE.The widget enables users to announce content from the page viewed on Drupal via email, IM, blogs, and social networking sites.
The possibility of spreading content from Drupal across diverse email and social networking channels makes this very different from other similar products. Also, users don't need to remember email addresses since the widget shows the contact lists from the respective email/social networks. That makes it a lot more powerful than other tools which just show a basic form to type email addresses.
The widget gets embedded in the content and lets the user announce a specific page than the entire site without moving to another page. Site owners can customize the widget properties and view usage statistics by signing up for FREE at http://secure.socialtwist.com/web/signup and getting a SocialTwist ID.