MRBS is a free, GPL, web application written in PHP and MySQL/PostgreSQL for booking meeting rooms, making reservations or other resources.
This very simple module offers single sign-on integration with MRBS and Drupal.
The module uses Drupal user accounts, permissions and sessions with MRBS.
Currently the module has only been tested when MRBS is installed in a subdirectory of Drupal root directory, but it should be quite easy to modify it for other installations.
Unpack in your modules folder (usually '/sites/all/modules/')
Enable under Administer > Site Building > Modules
· Drupal 6.x