Package apk extracts packages from the APK database.

Package cos extracts OS packages from Container Optimized OSes (go/cos).

Package dpkg extracts packages from dpkg database.

Package flatpak extracts packages from flatpak metainfo files.

Package homebrew extracts package information from OSX homebrew INSTALL_RECEIPT.json files.

Package macapps extracts applications data from Info.plist files of OS X devices.

Package osrelease parses the os-release file.

Package rpm extracts packages from rpm database.

Package snap extracts snap packages.