there's Sakai... and various customized versions, such as Berkeley's bSpace and Stanford's Coursework http://sakaiproject.org/ http://sakaiproject.org/ https:

there's Sakai... and various customized versions, such as Berkeley's bSpace and Stanford's Coursework http://sakaiproject.org/ http://sakaiproject.org/ https://bspace.berkeley.edu/ https://bspace.berkeley.edu/ https://coursework.stanford.edu/ https://coursework.stanford.edu/