Pogoseat - Pioneers of the in-event seat upgrade technology and Text-to-Buy mobile ticketing soltutions.
Eventjoy - The Easiest Way To Organize An Event
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
Flyer by Paperless Post - Fun to create. Easy to share. Totally free online invites.
Guestlist - Market events online, accepting registrations & ticket sales
Event Hunt - Startups and Tech Events Curated By Locals