Whatspot - Simple booking system for spaces in companies. Use app to reservations of meeting rooms, car fleet.
Mixmax Calendar - The fastest way to schedule meetings with anyone, anywhere
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.
Calendly for Chrome - Schedule meetings without leaving your inbox
Motion Firefox - All-in-one time management tool in Firefox
Polymail Calendar - Schedule meetings instantly over email