Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
WP-FB-AutoConnect - A lightweight but powerful Facebook login plugin, easy to setup and transparent to new and returning users alike. Supports Buddypress.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
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.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Janrain Engage - Social Login by Janrain