wxWidgets Cross-platform C++ GUI toolkit (GTK+ development)

 wxWidgets (formerly known as wxWindows) is a class library for C++ providing
 GUI components and other facilities on several popular platforms (and some
 unpopular ones as well). For more information see http://wxwidgets.org
 .
 This package provides a debug version of the wxGTK library. It is compiled
 both with -g for normal debugger tracing and with the __WXDEBUG__ flag which
 provides many internal checks by wxWidgets itself that are not performed on
 apps compiled with the 'release version' libs in the -dev package.