Cronofy - Unified Calendar API for developers
YArooms - YArooms is a web based booking software package that makes it easy for you to manage rooms and...
Calendarix - Calendarix is a powerful and easy to use web-based calendar that runs on PHP and MySQL.
Resource Central - Meeting room & resource scheduling software for Outlook
Campaign Calendar - Campaign Calendar by Bracket Labs builds a marketing calendar from your Salesforce Campaigns.
Smartway2 - Book meeting rooms, desks & more via mobile/Outlook/desktop