Gwern's article on folding @home https://www.gwern.net/Charity-is-not-about-helping

TLDR - As of 2015 it's been pretty useless for the amount of electricity and computing power it burns through.

Nothing particularly noteworthy listed on wikipedia either. https://en.wikipedia.org/wiki/Folding@home

Seems like if you have a huge cluster of computing and free electricity and want to help out it might be more useful to mine bitcoins and donate them to covid-19 charities.