Eric Yuan, Founder and CEO of Zoom, inventing a video calling app to call his long-distance girlfriend. Joined WebEx as one of the earliest engineers and eventually started his own company ([Link])(https://www.forbes.com/sites/peterhigh/2017/03/06/zoom-ceos-promise-to-his-wife-helped-inspire-a-1-billion-valued-company/)

Josh Wardle, creator of Wordle, made the game for his wife who was a huge fan of the NYT Daily Crossword (Link)

William Steward Halsted, inventor of rubber gloves, made them for his wife after her hands were chapped and red after surgeries (Link)