Other good ones are:
http://shiny.rstudio.com/ (Has Copyright on it, so we might not be able to use it)
https://www.geogebra.org/m/VafMWLBc (Non Commercial License Agreement)
https://www.zoology.ubc.ca/~whitlock/Kingfisher/KFhomepage.htm?mkt_tok=eyJpIjoiTnpSak1UWTVNVGd6WVRRMiIsInQiOiIyWEdOYWpUeUlHSk9venpQeUZXWXlFaGVYeHJ4UFR0bktwWXFLQnB1cmZkWGFyTmQybHcwREtQQVl3OGFSUGtaTEJMMWgrVk1LZDQ2bW9kVFM2dEU3ZVRmdHJiNU1KcmVZSUhYVG5IdHQ1UmdCQlJSZ2U3M1wvbXlwbFMwcUdGK1kifQ%3D%3D (released with Creative Commons Zero)
https://seeing-theory.brown.edu/ (Did not find copyright information)
https://rpsychologist.com/d3/CI/ (Did not find copyright information)
Thumbnail: Expectation–maximization algorithm clustering of Old Faithful eruption data. The random initial model (which, due to the different scales of the axes, appears to be two very flat and wide spheres) is fit to the observed data. In the first iterations, the model changes substantially, but then converges to the two modes of the geyser. Image used with permission (CC BY-SA 3.0 Unported; Chire via Wikimedia).