FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Mobile-Calendar - Reservation management system. If you rent accommodation, the mobile-calendar app was made for you!
Appoint.ly - Appoint.ly helps to schedule meetings quickly and easily through the integration with calendars online.