Cheap Bots, Done Quick!
Cheap Bots, Done Quick! was an open-source (1, 2, and 3) website created by V Buckenham that let you make Twitter bots using Tracery, a text-generating language created by Dr. Kate Compton. It was shut down by Twitter on April 6.
For a Mastodon alternative, see Cheap Bots, Toot Sweet!