Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Responsinator - Designed to test responsive websites on different devices.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Responsive Viewer - View multiple screen dimensions in one view
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.
Multi Screen Test - Test your site at different screen resolutions & devices.