Twtvite

Twtvite is an event organizer service that allows you to create Tweetups, manage a Tweetup group for recurring events, and sell tickets online. Here are some of our features: * Multiple Types of Tickets Let users RSVP in different categories, for example: attendees, sponsors, etc. * Send Invitations Invite friends via email or Twitter or send updates / changes about an event. * Sell Tickets Sell tickets directly from your event page. No per-ticket fees! * Manage Tweetup Group Let people find your Tweetup Group and keep in contact with your attendees. * Print Name tags & Guestlist. * Automatic waiting list for popular events. * Post-event survey.

Screenshots from Chrome Web Store