This article, from the Canadian Press, is OK, but it leaves out a lot of alternatives - including the fact that some of the services mentioned, while available in Canada, does not give you the full menu you can get if you're in the U.S. A VPN is a real must if you're really going to take advantage of them. But for what it's worth, here's their list:

A guide to free, ad-supported streaming services in Canada to trim your monthly bills