Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.
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.
Trexle - Payment Platform Supporting One-time and Recurring Billing
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Killbill - Open-Source Subscription Billing and Payment Platform
Reservio - Reservio is a simple online booking and appointment scheduling application.