Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.
Cron - Cron Calendar.
Button for Google Calendar™ - See your daily schedule and join meetings in one-click.
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.
Dawn Calendar - AI calendar scheduling tool