Seald - Keep your conversations secure, everywhere.
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.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Keybase Chat - End-to-end encrypted chat built into Keybase
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.