Stephen Downes

From the website: "Moodle is a course management system (CMS) - a software package designed to help educators create quality online courses. Such e-learning systems are sometimes also called Learning Management Systems (LMS) or Virtual Learning Environments (VLE). One of the main advantages of Moodle over other systems is a strong grounding in social constructionist pedagogy. Moodle is Open Source software, which means you are free to download it, use it, modify it and even distribute it..."