dev/null

The basic idé of a framework is to address core functionality on several platforms/environments, while leaving a small footprint as well.
This issue is very fundamental for most of the opensource developers nowadays.

I think that’s the most powerful and comprehensive framework available today for the C++ programming language.

Qt4 handles most of the aspects related to multiplatform coding; only small portions of the code are platform-dependent. Thus Wally can run under more than half a dozen Linux window managers, including KDE, GNOME, XFCE4, Fluxbox, and Blackbox, in addition to Windows and Mac OS X, as long as users have Qt4 installed.

Developer Antonio Di Monaco, from the Wally project