Calendly for Chrome - Schedule meetings without leaving your inbox
Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
Mixmax Calendar - The fastest way to schedule meetings with anyone, anywhere
BusyCal - powerful calendar app for macOS
Meetingbird for Gmail - View your calendar and schedule meetings right from Gmail
Google Calendar - Spend less time managing your day & more time enjoying it