libgtk-3-bin 3.6.4-0ubuntu4 (i386 binary) in ubuntu raring

 GTK+ is a multi-platform toolkit for creating graphical user
 interfaces. Offering a complete set of widgets, GTK+ is suitable
 for projects ranging from small one-off tools to complete application
 suites.
 .
 This package contains the utilities which are used by the libraries
 and other packages.