How to find OA free to publish journals with a JCR ranking? I would like to find journals that:


are ranked with JCR (no matter how low) and
have open access (anyone can access the papers for free) and
are free to publish (authors are not required to pay)


Maybe I am asking for a unicorn, but I think this should be feasible. 
If I'm not mistaken, arxiv.org only fails in the first point. If someone could provide (a link to) a list of such a kind of journals that would be awesome. If such a list does not exist, how would I go about creating a list.
Please feel free to edit anything.


Computer Science


Artificial Intelligence

Machine Learning

Journal of Machine Learning Research


General

Journal of Universal Computer Science


Mathematics


Combinatorics

The Electronic Journal of Combinatorics

Statistics 

Journal of Statistical Software