Yet another alternative to Xnest: not nested at all!

Daniel Molketin wrote about Xephyr, a better application for nesting X-servers (like xnest). I did not yet try Xephyr because it is not in Gentoo’s portage (is it? What name is it?) so I had to look for another easy way of programming KDE 4 apps. And in fact, it is the most simple one: [...]