Lotus 1 2 3.
Technically, it was Quattro (a WordPerfect product) which replaced Lotus 1-2-3. Not by sneak or stealth, but because it was a better product. Microsoft crushed WordPerfect not long after that. I think a shadow of the company still survives in Ireland or somewhere. Dell used to give away their suite with a new computer purchase. They may still do so.