I've made an email-based AI personal assistant I thought I'd roll into a business, but ultimately have kept it for personal use. I may open source this as it's a fun project built entirely on Cloudflare Workers (with the exception of one Postgres DB & mail routing).
I've written some really crappy Notion API (before the official API) to act as a CMS for a headless site.
I'm at a weird point in my life that I need to work on these little hacky projects because they bring me genuine joy. It's like lego to me.