Off the top of my head is the free pattern by verypurpleperson.co
m that she recently did. jcarolinecreative.c
That said, there's a difference between using someone's pattern (even if it's okay to sell what you make from it) and going around saying you designed it yourself and it's "your" pattern. I think everyone likes a little credit now and then.
And I agree with the above posters. Eventually, it's just easier to do your own patterns.