Radical online collections and archives – New Historical Express

I am very interested in the growing amount of radical literature from around the world that is being scanned and digitised. As there are so many and from many different places, I thought it would be useful to make a list. All of those that are included are free to access (there are others that require some form of subscription). If there are any that I have missed or if any links are broken, do let me know, either by commenting below or sending me an email.

Edit (Feb 2022): I have added categories of the list below for ease of finding the relevant collections.