Ask HN: Bicycles on the Information Superhighway?

I am interested in more examples of one to three man shops that are thriving (ie profitable) businesses with no plans to become the next billion dollar unicorn, a la Dan Grossman: https://news.ycombinator.com/item?id=10258542

Bonus points if they have a blog (he does, though it does not update very often: http://www.dangrossman.info/)

Thanks!