FullCalendar - FullCalendar is an open-source JavaScript event calendar.
BookSteam - BookSteam Online booking and appointment scheduling software for businesses worldwide. Easy to use, cloud based web scheduler that includes class and group bookings. Calendar management and schedule organization, trusted by thousands.
Letsfind - Letsfind is a fast, easy-to-use, ad-free way to create online (meeting) polls.
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.
MINDBODY - Find and book fitness and beauty classes near you.