BTW what I miss using KDE and willing to extend it is a concise widget toolkit. I've taken a look at source code of some plasmoids and it seemed quite extraterr

BTW what I miss using KDE and willing to extend it is a concise widget toolkit. I've taken a look at source code of some plasmoids and it seemed quite extraterrestrial to me, certainly not something you can start with quickly and easily so I've ended up using a widget (a "plasmoid") that just displays HTML and serving HTML content to it (and even that widget was not really easy to install).