Gtkdialog is described as 'Small utility for fast and easy GUI building. It can be used to create dialog boxes for almost any interpreted and compiled programs which is a very attractive feature since the developer does not have to learn various GUI languages for the miscellaneous' and is a Shell in the os & utilities category. There are more than 10 alternatives to Gtkdialog for a variety of platforms, including Linux, Windows, Mac, BSD and Python apps. The best Gtkdialog alternative is Zenity, which is both free and Open Source. Other great apps like Gtkdialog are Modern Message Box Generator, Glade, Yad and wxFormBuilder.