arianna : EPub Reader for mobile devices ( https://apps.kde.org/arianna/ )
chmk : CHM file viewer based on KDE Frameworks and QtWebEngine ( https://tsdgeos.blogspot.com/2020/05/chmk-simple-chm-viewer.htm )
kbibtex : BibTeX editor to edit bibliographies used with LaTeX ( https://apps.kde.org/kbibtex/ https://userbase.kde.org/KBibTeX )
kjots : Note taking utility by KDE ( https://userbase.kde.org/KJots https://community.kde.org/PIM/KJots )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a kde
For Paludis use this rsync : rsync://gentoo.zugaina.org/kde-portage
If you have a problem : ycarus(-at-)zugaina.org