Online-RSVP.com - Beautiful online RSVP for wedding & other events. Create an online invitation, track your guests responses.
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
Odoo - An all-integrated business app suite to unleash your growth potential.
Meetinch Attend - Your personal RSVP tracking assistant