SnapCalendar.io's answer
A clean, intuitive interface that simplifies scheduling and management tasks.
Appointment Reminder - Automated SMS/Voice and Email Reminders.
TideTask - Control your procrastination and never miss a task again
Reservio - Reservio is a simple online booking and appointment scheduling application.
Motion Firefox - All-in-one time management tool in Firefox
Square Appointments - Add an online booking link. Easily embed the customizable widget directly on your website. Any changes to your online scheduling, prices, or services update automatically.
Taskable - Using multiple work apps leads to tons of context switching, breaking flow and killing productivity.