WebApp Store, a WebApp is like a Mobile App, with the difference that it runs in the browser, like a website.

Thus, WebApps can be accessed from any Internet-enabled device via a link. You can use the App for yourself or share the link and use it with friends or colleagues, this enables great collaboration and seamless integration, because no one has to install a App, they just have to open the link and are ready to go. So you don't have to worry about any technical details and can just use the awesome Open Source WebApps like Wordpress, Nextcloud or Rocket.Chat.