Book Like A Boss - The Easy Way to Schedule Appointments and Sell Your Products & Services.
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Booknetic - WordPress Appointment Booking System
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
LIMS LABA Biobanking - LABA is software for management of storage facilities and stored material in biomedical research including biobanking.
Koalendar - Free Online Appointment Scheduling Software