Teem - Cloud-based meeting room booking system
Teamup Calendar - Cloud-based calendaring using capability URL, application developed in Zurich, Switzerland.
BOOKMEETINGROOM.COM - Book Meeting Room - Conference & Meeting Rooms Management
ApPHP Calendar - ApPHP Calendar is a PHP calendar script that may be easily integrated and used with various PHP projects, such as schedulers, event, etc.
Meetio Room - Meeting Room Booking System
Google Calendar - Spend less time managing your day & more time enjoying it