I started an open source project a few years ago that was relatively popular within a small community of developers. I started it because I wanted to learn more

I started an open source project a few years ago that was relatively popular within a small community of developers. I started it because I wanted to learn more about certain programming concepts and I wanted some practice at running an open source project. I promoted it by writing a few blog posts and by commenting on relevant posts by other developers. I also answered a fair number of StackOverflow questions with the recommendation to use my project as a solution (and learned early on that you should include the disclaimer that it’s your project). It was actually really fun responding to those StackOverflow questions because I got to see how my work could be used, and sometimes that gave me inspiration to make it better. I’ve also created open source projects that I think are really useful but that I never promoted. I feel like those projects are of less value to the developer community overall, but you never know who might find it useful.