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

Project                 License                   File
----------------------------------------------------------------------------
CP (Crystal Project)    LGPL                      image_LICENSE_CP.txt
Eclipse                 Eclipse Public License    image_LICENSE_Eclipse.txt
GV (Gael Varoquaux)     Public Domain             N/A
Nuvola                  LGPL                      image_LICENSE_Nuvola.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/developer/tools/vet/images:
                         action.png | Nuvola
                          class.png | Eclipse
                           code.png | GV
                         editor.png | GV
                        editors.png | GV
                       function.png | GV
                          group.png | Eclipse
                        handler.png | Eclipse
                           item.png | Eclipse
                          label.png | Eclipse
                           menu.png | Eclipse
                 menu_separator.png | GV
                         method.png | Nuvola
                        methods.png | Eclipse
                         module.png | Eclipse
             object_with_traits.png | GV
                        objects.png | CP
                        package.png | GV
                      separator.png | Eclipse
                      templates.png | Eclipse
                          trait.png | GV
                           view.png | Eclipse
