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.
TidyCal - Optimize your schedule with custom booking pages and calendar integrations
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Magical Mystery Club - Sharing free books from Harvard, anonymously
Calendar Screener - Rules to manage your calendar invites.