Meetingbird for Gmail - View your calendar and schedule meetings right from Gmail
Mixmax Calendar - The fastest way to schedule meetings with anyone, anywhere
Kin Calendar - The simple and connected calendar
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.
Zynq - Schedule meetings from an email with 1 click!
Polymail Calendar - Schedule meetings instantly over email