qtlockedfile : QFile extension with advisory locking functions ( https://code.qt.io/cgit/qt-solutions/qt-solutions.git/ )
qtsingleapplication : Qt library to start applications only once per user ( https://code.qt.io/cgit/qt-solutions/qt-solutions.git/ )
qtwebkit : WebKit rendering library for the Qt5 framework (deprecated) ( https://www.qt.io/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a powerman
For Paludis use this rsync : rsync://gentoo.zugaina.org/powerman-portage
If you have a problem : ycarus(-at-)zugaina.org