Sakai is most popular open source software for learning management system, research collaboration system and ePortfolio solution whereas Drupal is most powerful Content Management System. It is an amazing idea of using Sakai with Drupal. Integration will help you to show Sakai data on your Drupal website as well you can manage the sakai inside your Drupal admin.
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Cubic Web Solutions
email- info [at] cubicwebsolutions [dot] com