Cross-Platform GUI Programming with wxWidgets. Carl Albing and Michael Schwarz C GUI Programming with Qt 3 Jasmin Blanchette and Mark Summerfield Managing Linux Systems with Webmin: System Administration and Module Development Jamie Cameron. Programs contained herein. Opva 2 link download.

I really enjoy GTK+/gtkmm. Lots of demos and documentation.True. I too use GTK+ as for the same reason that it has loads of documentation.But warn you, GTK+ don't go so 'native' on windows.Anyways, If I got to choose form wxWidget or QT I will choose wxWidget any day.Another point to be noted ( as mentioned by scru) is that this question has lost its bones. It qualifies to be a FAQ. The OP should use a search engine before questing.Again, as I always those four magical words: Google is your friend.:).