ATutor is an Open Source Web-based Learning Content Management System (LCMS).https://en.wikipedia.org/wiki/ATutor
SWAD (originally stood for "Sistema Web de Apoyo a la Docencia" in Spanish or "Web System for Education Support", currently stands for "Shared Workspace At a Distance") is a web application to manage the courses, students and teachers of one or more educational institutions. https://en.wikipedia.org/wiki/SWAD_(software)
LAMS, the Learning Activity Management System, is a free and open-source Learning Design system for designing, managing and delivering online collaborative learning activities. It provides teachers with a visual authoring environment for creating sequences of learning activities. These activities can include a range of individual tasks, small group work and whole class activities based on both content and collaboration. LAMS is 'inspired' by the concept and principles of IMS Learning Design.[2] LAMS is developed in collaboration with LAMS Foundation and a number of educational institutions around the world. LAMS has been developed since 2003.[3] LAMS International (Sydney) and LAMS Education Asia (Singapore) are commercial companies that provide development and support services for the LAMS platform.https://en.wikipedia.org/wiki/LAMS