Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Square - Square helps millions of sellers run their business-from secure credit card processing to point of sale solutions. Get paid faster with Square. Sign up today!
WhenWorks - Mobile appointment scheduling
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
Inspora - virtual chat-stylist for fashion advice.
ITSCircle POS - ITSCircle POS is a point of sale solution for retail stores.