Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
Easy Appointment - Easy Appointments Get the extension! Integrate SMS, iCalendar, eCommerce and Google Calendar Buy now The #1 WordPress Appointment Plugin Improve your business with the Easy Appointments WordPress plugin.
WPAmelia - Award-winning WP booking plugin that manages services, appointments, customers, events, analyze business performance, and accept payments online.
Trafft - An online scheduling software that provide support to any business that relay on bookings.
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Koalendar - Free Online Appointment Scheduling Software