The Qt 4 Resource Center 45
e8johan writes "The Qt 4 Resource Center features articles regarding the next generation of Qt. Being the basis for the next generation of KDE and being available under GPL for all major platforms Qt 4 will make it even easier to develop powerful cross-platform applications."
free for open source (Score:3, Funny)
http://www.trolltech.com/company/model.html [trolltech.com]
With the exception of java most libraries don't seem to be as complete a cross platform solution. There are other solutions, they're just trying to make a quality cross platform solution, there are alternatives, but you have to collect the parts and put them together yourself, and test etc...
There is GTK which is cross platform for windowing and widgets. (GNOME is built on this)
If you don't like it don't buy it, but I love the irony of software developers whinning about software prices (or pirating for that matter).