Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
RSVPify - A powerful and awesomely customizable platform for selling tickets online for your event.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Punchbowl - A party planning and greeting card website
Odoo - An all-integrated business app suite to unleash your growth potential.
Whoozin.com - Free RSVP Online | Track RSVP’s and Sell Tickets for your events and recurring meetings.