VisualWX!

Zenity is a tool that allows you to display GTK dialog boxes in commandline and shell scripts.

Show KDE dialog boxes from shell scripts

wxDev-C++ is an extension of Bloodshed Dev-C++ by Colin Laplace et. al. This program helps you to create dialogs and frames for wxWidgets visually using a form designer. With all the wonderful features of Dev-C++, wxDev-C++ is still being actively developed. The main aim of this project is to provide the wxWidgets community with a free, open-source, commercial-grade IDE/RAD tool for development with wxWidgets.

wxWidgets is an excellent framework that enables the creation of multi-platform applications with and without a graphical user interface. There are several applications that help create dialogs visually, even so, some practical problems have led me to start the development of a new application. Those problems include, the limited set of widgets or the impossibility to include non-graphical components.

wxSmith is a Code::Blocks plugin for RAD editing of wxWidgets applications.

display dialog boxes from shell scripts

wxGlade is a GUI designer written in Python with the popular GUI toolkit wxPython, that helps you create wxWidgets/wxPython user interfaces. At the moment it can generate Python, C++, Perl, Lisp and XRC (wxWidgets' XML resources) code.

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 Ruby, or Python, or... etc).

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.

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 programming languages.

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. with the treeview, the file selector, the edit box, the range box, the help button/box). Because Xdialog uses GTK+, it will also match your desktop theme.