Ask HN: Small product, single founder success stories?

I have read some small product, single founder success stories on HN over the last few years. Can you share some stories/links even though it has been shared before on an unrelated thread?

On HN, patio11, edw519, peldi & jacques have all shared success stories before. I am interested to know more.

EDIT : By success, I mean happiness in life & financial independence to do interesting things in life.