MakePlans - Online appointment booking - MakePlans
MemberVault - MemberVault is a flexible platform that helps you to create, deliver, and sell your services, courses, memberships, subscriptions, etc.
Appointment Booking Calendar - With the Appointment Booking Calendar you can accept online bookings from a set of available time-slots in the calendar.
Chaordix Community Platform - Chaordix Community Platform is the digital platform that is used to build the community and engage customers for your brand by launching various activities and challenges.
Dudle - Dudle is an online scheduling application, which is free and open source.
Ruzuku - Ridiculously easy online courses