Appointment Booking Calendar - With the Appointment Booking Calendar you can accept online bookings from a set of available time-slots in the calendar.

Letsfind - Letsfind is a fast, easy-to-use, ad-free way to create online (meeting) polls.

MakePlans - Online appointment booking - MakePlans

Fasterplan - Fasterplan is a collaborative tool that helps you and your friends/business partners to better...

Dudle - Dudle is an online scheduling application, which is free and open source.

CozyCal - Online appointment scheduling