The older PyGtk bindings for the `Gtk+ 2 toolkit <http://www.gtk.org>`_ have
been implemented by James Henstridge; see <http://www.pygtk.org>.
+Kivy
+----
+
+`Kivy <https://kivy.org/>`_ is a cross-platform GUI library supporting both
+desktop operating systems (Windows, macOS, Linux) and mobile devices (Android,
+iOS). It is written in Python and Cython, and can use a range of windowing
+backends.
+
+Kivy is free and open source software distributed under the MIT license.
+
FLTK
----