I voted to close the question (along with others). I feel that it should remain closed for the following reasons:
This is a borderline homework-like question that can be investigated by you and an Internet search engine; and
There are multiple resources available that fit the bill or come close, which then turns your question into a request for a list, which goes against site policy.
The second point is, for me, the one that argues most closely for the "too broad" categorization.