I'd add https://publicdomainreview.org/ https://publicdomainreview.org/ which I've found to have a large variety of topics covered. I could also spend ages loo

I'd add https://publicdomainreview.org/ https://publicdomainreview.org/ which I've found to have a large variety of topics covered. I could also spend ages looking through http://www.textfiles.com http://www.textfiles.com. Lastly, https://monoskop.org/Monoskop https://monoskop.org/Monoskop, "a wiki for collaborative studies of the arts, media and humanities."