Winkli - Discover who you'll bump into at your Facebook events
EventsBase - Find the best professional events nearby or globally
Facebook Local - Discover places to go and events happening near you
Rally by Eventbrite - Find the best local events and rally your friends to join
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
Komos - komos.io is a free tool, that helps you discover comedy events near you and get event tickets for your favourite comics.