Whatspot - Simple booking system for spaces in companies. Use app to reservations of meeting rooms, car fleet.
Meetingbird for Gmail - View your calendar and schedule meetings right from Gmail
Task Muncher - Task Muncher is a cross-platform and web-based application that is designed to organize and keep the track of everything and focus on munching the weekly tasks.
Kin Calendar - The simple and connected calendar
Motion Firefox - All-in-one time management tool in Firefox
Calendly for Chrome - Schedule meetings without leaving your inbox