There are still a lot of project website in KDE using the old KDE3 Crystal or KDE4 Oxygen theme.
List of most of the outdated website:
* https://docs.kde.org D17936
* https://konsole.kde.org D20701
* https://kile.kde.org T10318
* https://cutehmi.kde.org/ https://invent.kde.org/websites/cutehmi-kde-org/merge_requests/1
* https://yakuake.kde.org/ - removed
* https://utils.kde.org
* https://umbrello.kde.org/
* https://solid.kde.org/
* https://phonon.kde.org/
* https://reqonk.kde.org (obsolete)
* https://quality.calligra.org/ (look dead)
* https://okular.kde.org/
* https://necessitas.kde.org/
* https://multimedia.kde.org/
* https://marble.kde.org/
* https://manifesto.kde.org/
* https://krusader.org/
* https://konversation.kde.org/
* https://konqueror.org/
* https://kmymoney.org/
* https://kdesrc-build.kde.org/
* https://juk.kde.org/
* https://relate.kde.org/
* https://games.kde.org/
* https://freebsd.kde.org/
* https://forum.kde.org/
* https://evolve.kde.org/
* https://events.kde.org/
* https://ev.kde.org/
* https://edu.kde.org/
* http://michpolicht.github.io/CuteHMI/ => https://cgit.kde.org/websites/cutehmi-kde-org.git/
* https://conf.kde.org/
* https://choqok.kde.org/ D22187
* https://ballot.kde.org/
* https://accessibility.kde.org/
* https://userbase.kde.org/ T11179
* https://community.kde.org T11179
* https://techbase.kde.org T11179
* https://www.kphotoalbum.org/
* https://lxr.kde.org/
* https://store.kde.org
* https://bugs.kde.org