xmessage is described as 'Display a message or query in a window (X-based /bin/echo)' and is a Shell in the os & utilities category. There are more than 10 alternatives to xmessage for Linux, Windows, Mac, Python and Qt. The best xmessage alternative is Zenity, which is both free and Open Source. Other great apps like xmessage are Modern Message Box Generator, Yad, KDialog and easybashgui.
Zenity is a tool that allows you to display GTK dialog boxes in commandline and shell scripts.
Zenity is the most popular Linux alternative to xmessage.
Zenity is the most popular Open Source & free alternative to xmessage.
Generates a customizable "Task Dialog" box - a more modern version of the old Windows message box.'
Modern Message Box Generator is the most popular Windows alternative to xmessage.
Yad (yet another dialog) is a fork of Zenity with many improvements, such as custom buttons, additional dialogs, pop-up menu in notification icon and more. It's useful for creating quick and easy GUIs for shell and batch scripting.
Bash functions library for *BSD and GNU/Linux that aims to give simple GUI functions using yad, gtkdialog, kdialog, zenity, Xdialog, (c)dialog, whiptail or bash builtins depending on KDE or GNOME running or not, Yad/Gtkdialog/Xdialog installed or not and, eventually, X...
MessagePop is a simple application designed to help you convey a message to the computer user. The program allows you to specify the message text and the other parameters from the command line.
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...
CocoaDialog is the most popular Mac alternative to xmessage.
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Does not work with Linux, which xmessage only works with.