[AdamCraven]

For the charts he's using chart-js with a chartjs-plugin-rough [1] to give it the hand-drawn look. Chardin Js for the overlays [2] and it looks like the rest of the graphics are created by hand using Sodipod or Inkscape [3].

----

[1] https://nagix.github.io/chartjs-plugin-rough/

[2] https://heelhook.github.io/chardin.js/

[3] https://inkscape.org/