Lounge

Sakai 1.5.0 is a powerful collaboration and edu framework which runs on Tomcat. Its QTI authoring and assessment package, called Samigo still needs Oracle DB as a backend.

In that class, there is OLAT as well www.olat.org which needs Java SDK, Tomcat and Apache ANT configured before a production instance may run on your server.

Moodle is great as it is flexible, adaptable and is fast conforming to standards driven (SCORM, QTI) Leraning Objects.

Mambo is a PHP/MySQL based CMS --- no relation with Sakai.

Hope that clarifies.