Smart Compose in Gmail - Write emails faster with Smart Compose in Gmail
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.
EasyEmail - Gmail plug-in that helps you write emails quickly
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
Missive - Team communication app now supporting FB, Twitter & SMS
YouCanBook.me - YouCanBook.me is a cloud-based service which allows your customers to schedule appointments and make bookings.