Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Stepsi - Be more efficient, save time, and manage top events online
Ticket Tribe - Sell tickets online with no fees per ticket
StrawPoll - StrawPoll Meetings offers a simple interface to create polls that can be used to schedule meetings. With two simple steps, your next meeting is scheduled in seconds.
pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features