A really fast thesaurus… with lots of synonyms.
Get in touch with the owner to discuss the tech stack, market size, or just make an offer!
A bot that keeps Trello cards in sync.
There's also https://teams.cardsync.xyz/, a version that works as a Trello Power-Up. It is tied to Trello teams (so all team members can use) instead of to a single Trello user -- it also uses custom bots per team instead of a single global bot.
Instant voice-over generator for explainer videos or IVR systems.