Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
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.
Letsfind - Letsfind is a fast, easy-to-use, ad-free way to create online (meeting) polls.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
FreeBu - Smart free/busy calendar sharing and meeting organizer.