6.3. Acronyms: LMS (Learning Management System), IDLE (Integrated Distributed Learning Environments), LCMS (LMS and Content Management System). Open Source examples: Claroline, Moodle, Ilias, Atutor, WebCT, BlackBoard, Luvit, Centrinity, etc.
Commercial: They are paid. Among the best known are Blackboard, WebCT, OSMedia, eCollege, Fronter, SidWeb, e ducativa and Catedra, among others.
Free software: They are of the "Open Source" type, which establishes that they are freely accessible. Among the most used are Atutor, Dokeos, Claroline, dotLRN, Moodle, Ganesha, ILIAS and Sakai.
In the cloud: They are not considered LMS platforms themselves, because their greatest utility is to allow support for the face-to-face class. The most popular are Udacity, Coursera, Udemy, edX, Ecaths, Wiziq, and Edmodo, among others.