Meetingbird for Gmail - View your calendar and schedule meetings right from Gmail
Calendly for Chrome - Schedule meetings without leaving your inbox
Kin Calendar - The simple and connected calendar
Plann3r - Schedule any kind of meeting in less than 30 seconds!
Google Calendar - Spend less time managing your day & more time enjoying it
Clara - Clara is a virtual employee that schedules your meetings, getting you to the work that matters, faster.