The icons are mostly derived work from other icons. As such they are
licensed accordingly to the original license:

Project                 License                   File
----------------------------------------------------------------------------
Enthought               BSD 3-Clause              LICENSE.txt

Unless stated in this file, icons are the work of Enthought, and are
released under a 3 clause BSD license.

Files and orginal authors:
----------------------------------------------------------------------------
enthought/pyface/ui/qt4/images:
                    application.png | Enthought
                heading_level_1.png | Enthought
enthought/traits/ui/qt4/images:
                          frame.png | Enthought
                    list_editor.png | Enthought