KDecoration3 is a library to create window decorations. These window decorations
can be used by for example an X11 based window manager which re-parents a Client
window to a window decoration frame.

The library consists of two parts:
* Decoration API for implementing a Decoration theme
* Private API to implement the backend part (e.g. from Window Manager side)

Homepage:
https://kde.org/plasma-desktop/
