LectureDoc2 is an authoring system for lecture material.
See https://delors.github.io/LectureDoc2/renaissance/readme.en.rst.html for further technical details.
See https://delors.github.io/LectureDoc2/renaissance/folien.en.rst.html for a slide set which demonstrates some features of LectureDoc2.
Go to http://www.michael-eichberg.de/teaching.html for a large collection of freely available lectures that are authored using LectureDoc2.