Zenity is described as 'Tool that allows you to display GTK dialog boxes in commandline and shell scripts' and is a Shell in the os & utilities category. There are more than 10 alternatives to Zenity for a variety of platforms, including Linux, Windows, Mac, BSD and Python apps. The best Zenity alternative is Yad, which is both free and Open Source. Other great apps like Zenity are Modern Message Box Generator, wxFormBuilder, easybashgui and KDialog.
Visualwx aims to be the ultimate RAD tool, designed for c++, python, perl, ruby, lua and wxWidgets. Still there are many things to do, but we've achieved considerable progress.
CocoaDialog is an OS X application that allows the use of common GUI controls such as file selectors, text input, progress bars, yes/no confirmations and more with a command-line application. It requires no knowledge of Cocoa, and is ideal for use in shell and Perl scripts (or...
XRCed is a simple resource editor for wxWidgets/wxPython GUI development which supports creating and editing files in XRC format It is written in Python and uses wxPython GUI toolkit.
Xdialog is designed to be a drop in replacement for the "dialog" or "cdialog" programs. It converts any terminal based program into a program with an X-windows interface. The dialogs are easier to see and use while adding even more functionalities (e.g.
Anthemion DialogBlocks is a sizer-based resource editor that quickly gets you creating professional-looking dialogs, wizards and frames for deployment on Windows, Linux, Mac or any other supported wxWidgets platform.
Gtkdialog is a 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...
Gtk-Stream is a tool that takes on its standard input a XML description of what your application should do (spawn a window, add/remove a widget, change a property, add a stylesheet, ...), while outputting events on its standard output.
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It provides most of the same features of Zenity for Mac users