I really like the HN/Twitter/Indie Hacker posts about solo founders building a boring, simple product. It inspires me to look for an unsexy problem and come up with a simple solution. I've seen some other similar sites but wanted to make my own because I don't like annoying popups and I just want to see a list. There are no ads, no "feed algorithms", no tracking, and no AI. Just a simple list (not even paginated!). Take a look around and I'd be appreciative of your feedback!
(most are solo-founder, minimal marketing, boring solution spaces, profitable. although some have grown significantly since their humble beginnings)