Here is one by the inventor of VisiCalc, Dan Bricklin, on github: https://github.com/DanBricklin/socialcalc
Audrey Tang (who happens to currently serve as the Minister of Digital Affairs of the Republic of China (Taiwan)) created the Node.js port of SocialCalc, EtherCalc: https://github.com/audreyt/ethercalc
Audrey made a fascinating write up of SocialCalc for The Architecture of Open Source Applications https://aosabook.org/en/v1/socialcalc.html