@gekitsu yes, they should work outsidea KDE Plasma session just fine.
Their "apps.kde.org" page provides a (bit outdated) screenshot what they look like:
- https://apps.kde.org/skanlite/
- https://apps.kde.org/skanpage/
Maybe (if you're using Flatpak) just give the most recent version a try to see whether they can serve your use-case or check, whether your distribution provides them as packages.
@gekitsu oh, sorry - just realized only Skanpage is available via Flatpak.
But since Skanlite is the more established application it's also more likely to be found in your distribution's repositories.
@davidrevoy