During my math studies in Münster I always took notes in lectures using $\LaTeX$. At first I shared the notes via Dropbox, but moved to a git based setup later on. The repository containing the source files is available on GitLab. The README contains links to all PDFs; alternatively there is a sciebo share with all the PDFs.
The PDFs are build using the GitLab CI upon each new commit. I am glad that this project became popular enough to convey others to contribute lectures notes for courses I did not take.