Have a look at my company https://info-beamer.com https://info-beamer.com. It operates a Pi based signage platform with lots of possiblities to completely custo

Have a look at my company https://info-beamer.com https://info-beamer.com. It operates a Pi based signage platform with lots of possiblities to completely customize what happens on the screen. It can directly import packages that control what happens from github, where you also find a lot of the code for the existing solutions: https://github.com/info-beamer https://github.com/info-beamer. The OS is minimal (~40MB currently) and trivial to install.