For work: a forensic accounting as a service (FAAAS) product, if only so that I can cram an extra A into the acronym. It’s a niche product for a particular legal area that I have experience in.

For fun: https://playspindle.com/ - a cross between Wordle and a Rubik’s cube. The basic game is there, but I plan to flesh out the surrounding features, eg a social leaderboard so you can compare your score against your friends each day.