Tagvenue - Online venue hire marketplace with a difference. Get together in the right venue.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
VenueScanner - Connecting event organisers with venue hosts
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
What a Space - Dai spazio alle tue idee
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.