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

Project                 License                   File
----------------------------------------------------------------------------
Eclipse                 Eclipse Public License    image_LICENSE_Eclipse.txt
Enthought               BSD 3-Clause              LICENSE.txt
GV (Gael Varoquaux)     Public Domain             N/A
Nuvola                  LGPL                      image_LICENSE_Nuvola.txt
OOo                     LGPL                      image_LICENSE_OOo.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/wx/images:
                    application.ico | Enthought
                heading_level_1.png | Enthought
                        warning.png | GV
enthought/traits/ui/wx/images:
                   cb_hover_off.png | Enthought
                    cb_hover_on.png | Enthought
                         cb_off.png | Enthought
                          cb_on.png | Enthought
                           file.png | Enthought
                          frame.ico | Enthought
                          group.png | Nuvola
                           item.png | Eclipse
                    list_editor.png | Enthought
                        nb_open.png | Enthought
                         object.png | Enthought
                           open.png | Nuvola
                      table_add.png | OOo
                   table_colors.png | GV
                   table_delete.png | OOo
         table_delete_synthetic.png | OOo
                  table_display.png | OOo
                table_move_down.png | GV
                  table_move_up.png | GV
                  table_no_sort.png | OOo
                    table_prefs.png | OOo
                   table_search.png | OOo
                table_synthetic.png | OOo
                 table_undelete.png | OOo