Claroline is an Open Source software based on PHP/MySQL. It’s a collaborative learning environment allowing teachers or education institutions to create and administer courses through the web. The system provides group management, forums, document repositories, calendar, chat, assignment areas, links, user profile administration on a single and highly integrated package. Claroline is translated in more than 20 languages and used by hundreds of institutions around world.The software was initially started by the University of Louvain (Belgium) and released under Open Source licence (GPL). Since then, a comunity of developper around the world contributes to its development. Downloading and using Claroline is completly free of charge.