DemocracyOS - DemocracyOS is an open source application for online decision making.
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.
Owlie - A beautiful app for quick decision making with friends
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Decidim - Free Open-Source participatory democracy for cities and organizations
YouCanBook.me - YouCanBook.me is a cloud-based service which allows your customers to schedule appointments and make bookings.