FME Magento Auction Extension - This Magento Auction Extension helps you create your own auction website in minutes!
NASH OS - Nash OS for Modern Ecommerce
Janrain Engage - Social Login by Janrain
bideg - At bideg.com you will get Online Auction Software for all type of marketplace. Our Online Auction and Purchasing Management Software reduce your cost in creating online auction.
Apptha Social Login - Apptha Social Login is a Magento extension that allows eCommerce store customers to login via social network accounts like Facebook, Twitter, Google and Yahoo. There is also a default registration page and login page of the magento e-store.
WP-FB-AutoConnect - A lightweight but powerful Facebook login plugin, easy to setup and transparent to new and returning users alike. Supports Buddypress.