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.

SavvyCal - A scheduling tool both the sender and the recipient will love.

Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.

TidyCal - Optimize your schedule with custom booking pages and calendar integrations

Waaard - Share links, files, and notes that only your (customers|friends|teammates|followers|clients) can open.

FreeBusy - Easiest way to share availability across calendars for free