It's FOSS - https://itsfoss.com/univention-app-center/
Since the rise of smartphones digital distribution platforms for computer software have multiplied and with them the use of applications as “apps”. Major players in this field are Apple and Google offering all kinds of apps that are easy to download and integrate on people’s mobiles.
But what about server and business applications for an organization that can be used both on-premise and in the cloud? How about being able to install a whole range of enterprise applications and integrate them in your IT environment with just a few clicks?
Univention, the maker of Univention Corporate Server (UCS), a free,