It’s amazing what you come upon surfing around the world. EdTechPost mentions ETH-Z’s open source LCMS called dLCMS (dynamic content learning management system). Built on top of an open source CMS called Silva, the dLCMS released a beta version in October 2006.
According to that news item from October (the most recent one, apparently):
Composing learning units is now much easier. The new dLCMS Learning Unit allows authors to create content elements and learning units in one single step directly in the repository.