Graphical

    Tkinter is the standard GUI included with Python.
    wxPython is a separate but very popular alternative.
    PyGame is a single-window GUI specifically for Games programming.

    Two similar pages from the Python Wiki:
      - GUI Programming in Python
      - GUI Programming

    Straw Dogs (Sep 2008) has a useful review.
    Advises against:
      - PythonCard, Boa Constructor, IronPython Studio, PythonWorks, PAGE.
    On the same page, (09 Feb 2009) reeno suggest the Eric Python IDE.
    (Eric also requires: Python, Qt, PyQt and QScintilla. See details.)

    wxPython The wxPython Linux Tutorial (Another Tutorial)
    wxPython & MVC Model View Controller in Python
    ZetCode Tutorials, ... - Including Python, wxPython, NetBeans, Java, ...