https://www.resourcespace.com/svn. Isn’t it free to self host?
Edit: Instructions seem to be here:
https://www.resourcespace.com/knowledge-base/systemadmin/install_overview
I have no idea what any of this means. Plz hlp
And in regards of text and graphs: everything is mirrored from behind. I am not sure what transparent screens may be used for.
Doesn’t this already exist since half a century? https://en.m.wikipedia.org/wiki/Head-up_display No need for a transparent display at all.
Please note that Germany has (compared to other EU members) quite strict and company-friendly protesting laws.
Such protests may be even considered as political protest (Politischer Streik) which makes them not illegal per se but could be illegal. https://www.bpb.de/themen/medien-journalismus/netzdebatte/219308/ein-bisschen-verboten-politischer-streik/