The No GApps app packages are intended to serve as replacements for the GApps packages usually flashed on custom Android ROMs during a new install. These particular No GApps packages mirror the names and contents of the OpenGapps packages, though with free/open source apps and no Play Services. Those looking for an alternative to Google Play Services should look at microG.
Installs as a system app, removing the need to enable “Unknown sources”. May require a reboot after first boot to be able to install apps.
Installs F-Droid and Aurora Store as system apps, allowing both to install apps without enabling “Unknown Sources” and without forcing the user to confirm any install or update. F-Droid is automatically set to do this, while Aurora Store requires the user to set the “Installation method” setting to “Using system permissions.” No other apps are included.