WhyQ - WhyQ is an appointment scheduling solution that enhances and simplifies the way companies manage the influx of their customers.
Dudle - Dudle is an online scheduling application, which is free and open source.
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
Framadate - Make your polls