RAD GUI builders for Python include:

MicrosoftWindows beginner programmers
 * Pythoncard http://pythoncard.sourceforge.net (uses wx)
 * SpecTix http://starship.python.net/crew/mike/src/Spectix/Spectix.html (uses Tcl/Tk/Tix)


Web:
 * ZopeApplicationServer

100% Python:
 * http://boa-constructor.sourceforge.net/
 * http://www.pythonware.com/products/works/

COM:
 * Use VB/Interdev to construct your GUI and use Python COM servers to handle events.
 * Extend Pythonwin (http://starship.python.net/crew/mhammond/win32/PythonwinPreview.html)

Java:
 * Combine http://www.jpython.org with your favourite IDE. VisualAge?

GTK+ (GtkPlus):
 * Use http://glade.pn.org/ to design it and then ftp://ftp.daa.com.au/pub/james/python to read the XML file in and instrument it.

Qt:
  * You can use Qt Designer from Trolltech that comes with Qt together with PyQt  - http://www.riverbankcomputing.co.uk

DotNet:
 * Visual Python is ActiveState's Python plug-in for Visual Studio.NET. - http://www.activestate.com/ASPN/Downloads/VisualPython/

VisualPython:
* Not so much a GUI builder as a GUI environment: http://vpython.org

Others?

check this for another list:
http://twistedmatrix.com/users/jh.twistd/python/moin.cgi/PythonGraphicalGuiBuilders
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CategoryPython