Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
FreeBu - Smart free/busy calendar sharing and meeting organizer.
Calendar.AI - Discover everything about the people and companies you meet
Letsfind - Letsfind is a fast, easy-to-use, ad-free way to create online (meeting) polls.
Koalendar - Free Online Appointment Scheduling Software
FullCalendar - FullCalendar is an open-source JavaScript event calendar.