Endless OS comes with more than 100 apps installed, covering a variety of subjects, and most of them do not require an internet connection. However, we know that people want to do lots of different things with their computers, more than we can fit into the version that you get on your computer or download so we have the Endless OS App Center directly on your home screen to get new apps.
The Endless OS App Center comes pre-configured to install additional apps provided by Endless and external and 3rd party developers using the Flathub project. Flathub uses the Flatpak, app distribution system to run apps safely and securely on a number of different Linux systems. Any developer can add their application to Flathub and have it show up in the Endless App Center.
For advanced users it's possible to install Flatpak apps from other sources, as well, the Flatpak web site has instructions for how to add more app sources, and how to install Flatpak apps directly from the command line. Flatpak is a new technology, with more apps becoming available all the time. If your favourite app is not yet available as a Flatpak, ask its developers to consider it, so it can be easily installed on Endless OS and other Linux distributions.