Fantastical Scheduling - Use Openings to create and share your Fantastical link so others can book meetings that work with your schedule.
Timewise - Instant calendar analytics for busy managers
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Hours - Boosting productivity through live, virtual co-working.
Timist - Track your time, session by session
Mynt21 Business - The appointment scheduling app that empowers businesses