Modern Education and Technology Associates (Meta) has just released the first beta version of their OpenCourseWare modification for the Moodle learning management system. Version 0.14 of the OCW MetaMod® for Moodle provides instructors and designers with the ability to mark individual resources or activities within a Moodle course as "private" (only visible for registered students) or "shared" (allowing anonymous guest viewing). Additionally, the OCW MetaMod® for Moodle provides for tagging of resources and activities as either Copyrighted (C) or Creative Commons license/Copyright cleared (CC).

Future versions of the OCW MetaMod® for Moodle will add a third option for Moodle activities: "open", allowing registered non-students to interact with the class. This is different from "shared", as it allows authenticated users on the Moodle system who are not officially registered for the course to interact with students and instructors on the discussion board, take quizzes, complete activities, contribute to wikis, etc.

http://www.metasolutions.us/resources/moodle/mods/ocw_metamod.php