I am looking for a Linux application which runs on top of/parallel to a "normal" desktop environment (Xfce, Gnome) and provides the features of a tiling window manager. Thus you can combine the two worlds. E.g. you can still move/resize your windows with the mouse or you can move/resize them with keyboard shortcuts.
Compiz provides a similar feature with the grid-plugin. Nevertheless I would like to avoid Compiz as, in my opinion, there is a 50-50 chance that it becomes more stable or more buggy after the next release.
If it is easier to answer, I am looking specially for an application for Xfce. Nevertheless an application with such a functionality and which runs in more environments would be nice to know.