The Future of Food
What the Bleep do We Know
Guns, Germs and Steel (made after the book by Jared Diamond)
The Obama Deception
Enron:The Smartest Guys in the Room
Money as Debt
The 11th Hour (a more realistic view on climate change than Al Gore's sensationalist movie)
The Great Global Warming Swindle
What in the World Are They Spraying?
The World According to Monsanto
Free Energy: The Race to Zero Point
I was going to mention America: Freedom to Fascism but you already mentioned it. You also already mentioned all my favorite music documentaries. Festival Express is so goddamn awesome.
most of the movies i mentioned are available here: http://topdocumentaryfilms.com/watch-online/