This site will help you make a Mastobot! They're easy to make and free (for you) to run.
To use this, create an account for your bot to use on a bot-friendly Mastodon instance (such as botsin.space) then fill in your instance down below to get started. If you're having trouble with a particular instance, feel free to let me know at @firstname.lastname@example.org or @boodooperson on the birdsite.
Bots are written in Tracery, a tool for writing generative grammars developed by Kate Compton.
The original CheapBotsDoneQuick.com was created by George Buckenham - they have a Patreon, I do not.