Moodle is a free software e-learning platform (also known as a Course Management System (CMS), or Learning Management Systems (LMS), or Virtual Learning Environment (VLE)). It has a significant user base with 25,281 registered sites with 10,405,167 users in 1,023,914 courses (as of May 13, 2007) [1]. Amazon.com uses it to train employees.

Moodle is because it provides a full variety content of activities that teachers can add to a course.

Another reason to recommend Moodle is because of its philosophical foundations. Moodle is designed with a social constructionist philosophy, a belief that people actively construct new knowledge as they interact with their environment, and that learning is more effective when you're constructing something that others experience.

Moodle can also function as a tuition collection system. Moodle managers can set a standard price for an entire curriculum and for individual courses. Schools can decide on an enrollment system that includes tuition collection using authorize.net or PayPal.

Moodle has many features expected from an e-learning platform including:

•   Forums
•   Easy handling of "rolling events" like speaking engagements
•   Content managing (resources)
•   Quizzes with different kinds of questions
•   Blogs
•   Wikis
•   Database activities
•   Surveys
•   Chat
•   Glossaries
•   Peer assessment
•   Multi-language support (over 60 languages are supported for the
     interface [2])

Moodle is modular in construction and can readily be extended by creating plugins for specific new functionality.

Moodle's infrastructure supports many types of plugin:

•   Activities
•   Resource types
•   Question types
•   Data field types (for the database activity)
•   Graphical themes
•   Authentication methods
•   Enrollment methods
•   Content Filters