Task Muncher - Task Muncher is a cross-platform and web-based application that is designed to organize and keep the track of everything and focus on munching the weekly tasks.

Pulse 24/7 - Booking & scheduling mobile app for service providers

TideTask - Control your procrastination and never miss a task again

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

Taskable - Using multiple work apps leads to tons of context switching, breaking flow and killing productivity.

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