> display managers You mean "window manager", right? Why would depend on a specific WM unless you were writing a WM-specific utility where no decision would be

> display managers You mean "window manager", right? Why would depend on a specific WM unless you were writing a WM-specific utility where no decision would be necessary? Your application only needs to target X11, which is implicit when you use a pre-existing toolkit. > audio devices What audio devices? Just write to the default ALSA device. Better yet, delegate the problem by linking to something like OpenAL. I'm sure there are edge that are more complicated to port, but that is true for any OS. For most apps, porting shouldn't be particularly difficult.