[2] Tkinter is included with standard Linux, Microsoft Windows and macOS installs of Python.

Tkinter was written by Steen Lumholt and Guido van Rossum,[3] then later revised by Fredrik Lundh.

There are several popular GUI library alternatives available, such as Kivy, Pygame, Pyglet, PyGObject, PyQt, PySide, and wxPython.

The generic term for any of the building blocks that make up an application in a graphical user interface.

In Tkinter, the Frame widget is the basic unit of organization for complex layouts.