The Janrain for Drupal Extension integrates Drupal sites with the powerful Janrain Engage service by enabling Drupal sites to authenticate new and existing users with popular social networks, map user profile data from these websites to Drupal fields, and promote sharing of Drupal content with users' friends on their social networks.
In particular, the module helps Drupal websites quickly and seamlessly integrate with more than 25 social networks and identity providers, including Facebook, Twitter, Google, Yahoo!, LinkedIn, Myspace, AOL, PayPal, and Salesforce.com.
Additionally, Janrain for Drupal also enables Drupal site owners with the ability to leverage Janrain Engage's Social Sharing functionality, driving qualified referral traffic back to your site.
Instead of having to integrate with each of these sites on your own (and manage API changes over time), Janrain Engage does the heavy lifting for you. Using this module, you can get set up in under ten minutes. The result is an accelerated user registration process, an enhanced ability to gather user data, and increased site traffic from the viral promotion of your content.