The KDE TechBase is primarily aimed at external developers.
You can find documentation to help to build or extend
your own projects with KDE software.
Documentation for various KDE frameworks and tools for developers,
great for both external 3rd-party developers and KDE contributors.
KDE isn't the only community developing with Qt, Inqlude is
an archive containing many Qt-based libraries, not just those
by the KDE community.
KDE technology heavily depends on and contributes to Qt. If you
are not experienced in Qt you should first examine Qt documentaiton.
Plasma is made to be flexible; learn how to develop widgets, themes and other enhancements to your workspace.
How to get an account to contribute to the KDE.
Phabricator is the new way to review, manage, and work with