GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
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.
Kareo - Kareo - Go Practice | Medical Office Software for Small Practices
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
OpenMRS - OpenMRS is a community-developed, open source, enterprise electronic medical record system platform.
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.