usa_box_plot, a Python code which creates simplified maps of the USA in which each state appears as a box, and the placement of the boxes only roughly corresponds to the relative locations of states on an accurate map.
The computer code and data files made available on this web page are distributed under the MIT license
usa_box_plot is available in a MATLAB version and a Python version.
usa_matrix, a Python code which defines the adjacency matrix for US states, using a variety of matrix formats.