MRBS is a free, GPL, web application using PHP and MySQL/pgsql for booking meeting rooms or other resources.

Some features:

• Web/Intranet based - Available from any workstation through a Browser
• Simple to follow, Web based options and intuitive presentation
• Flexible Repeating Bookings
• Authentication with your existing user database (eg Netware, NT Domain, NIS etc.)
• Ensures that conflicting entries cannot be entered
• Reporting option
• Selectable DAY / WEEK / MONTH views
• Multiple auth levels (read-only, user, admin)
• Support for bookings by time or period - ideal for use in schools
• Room administrators can be notified of bookings by email
• Multiple languages supported (translated to Catalan, Czech, Chinese, Danish, Dutch, Finnish, French, German, Greek, Italian, Japanese, Korean, Norwegian, Portuguese, Slovenian, Spanish, Swedish, Turkish)
• Stable and in use at many organizations
• MySQL and Postgres support