Addition to "Published sheet music"

Hi,

I just found https://lilypond.org/productions.html with its listings of
published sheet music.

As an addition, I submit https://ebersberger-liedersammlung.de/ which is
a collection of approx. 240 copyright-free songs (mostly German), all
set in Lilypond.

(Disclaimer: I have been helping out in this project since December
2024.)

Cheers
Bjørn