I'm doing exactly this. I started out only intending to create something for myself. As it got better, I thought that other people might want to use it. I briefly considered trying to sell it, and pretty quickly realized that I didn't want to ruin something I was having fun with by turning it into a business.

Now, instead of worrying about sales, I get to feel good about giving something back to the FOSS community that has given me so much.

I recognize that it is a position of privilege to be able to dedicate so much of my time to a project that gives me nothing financially... and in fact costs me money to produce. No shade at all to people who are not so lucky and need to sell what they make.

Anyway, if you're interested, here's what I'm working on. Feature-wise it's come a long way since the last HN post about it.

https://news.ycombinator.com/item?id=46619391

And if you're not interested, that's OK, because I'm not trying to sell you anything!