I've been working on a passion project over the last couple weeks, and I really wish I could do this full-time, and it's one of my biggest driving factors for FI. I don't want to monetize it though, so it's not something I'd be able to just commit to if it gets traction (it's open source though, so maybe a sponsorship?).
Anyway, what projects do you all want to spend time on once FI? Are you working on them now?