He later wrote Microsoft Word, and other parts of what became MS Office, at Microsoft, where he was Chief Architect:
https://en.wikipedia.org/wiki/Charles_Simonyi
He designed what is now called Hungarian Notation:
https://en.wikipedia.org/wiki/Hungarian_notation
Word uses the famous piece table data structure -- also from PARC -- which is how "fast saves" work.
https://web.archive.org/web/20160308183811/http://1017.songt...
As a result Simonyi is a billionaire and was the first ever two-time space tourist:
https://www.theguardian.com/world/2009/mar/26/space-tourist-...
You could justifiably say that he and his work are quite famous. (!)