Joomla has an advanced permission system called Access Control List (ACL), and it's a great way to define groups with their own set of permissions. Unfortunately, the core Joomla ACL system can be difficult to comprehend, and that's where the ACL Manager comes in! Available in 28 languages, the ACL Manager features tools to help users easily understand and manage Users, User Groups, Permission and Access Levels.
Sander Potjer is recognized leader in the Joomla community. He is actively involved in the Joomla Project and can be found at many Joomla Events around the world. Not only is he the developer of the ACL Manager, he's a member of the Joomla Leadership Team and co-founder of the Dutch Joomla User Group and Joomla!Days Netherlands. Sander also owns Sander Potjer Webdesign where he specializes in Joomla CMS implementation. Read a recent interview with Sander from June's edition of the Joomla Community Magazine.