Build GUIs using the Tkinter widgets without having to write the source code.
Builder DSP allows you to go from system definition/models.
Tcl Developer Xchange
Tcl is an interpreted language and very portable interpreter for that language.
It lets you quickly design user interfaces (UI) for JavaFX applications.
Caretta Software Ltd.
Design and prototype interfaces for Windows software applications.
An IDE for the Liberty BASIC windows programming language based on Scintilla.
A cross-platform Python IDE and wxPython GUI Builder.
Mars Microsystems Company
The easiest Java Swing GUI builder generating human readable Java code.
José Antonio Hurtado
wxFormBuilder is an open source GUI builder for wxWidgets.
TViXiE is a GUI builder for Media Players currently supporting TViX, NMT.
Bradly Associates Ltd,
GINOMENU Studio is a fully interactive GUI builder and development environment.
DroidDraw is a graphical user interface (GUI) builder for the Android platform.
Map Builder is GUI-driven map maker software and a data distribution service.
MRTG GUI software is a useful CFG file rapid builder.
Report generator for C/C++ applications with GUI report builder and samples.