I have used Markov chains for a few fun projects, like this Markov chain headline generator (https://locserendipity.com/Markov_Headlines.html https://locserendi

I have used Markov chains for a few fun projects, like this Markov chain headline generator (https://locserendipity.com/Markov_Headlines.html https://locserendipity.com/Markov_Headlines.html), and a Markov generator based on a certain someone's Twitter feed (https://locserendipity.com/Markov_Trump.html https://locserendipity.com/Markov_Trump.html), but this looks like a good resources for more serious applications.