figlet, of course

banner, as the grandparent of figlet and cowsay

lolcat, for colourising their output

pig (from bsd-games), for producing pig latin

dadadodo, jwz's Markov chain nonsense generator from the late 90s that seems eerily prescient in the light of today's LLMs

dissociated-press, a simpler version of dadadodo dating back to the dawn of Emacs