http://www.anus.com/metal/about/grindcore.html
View post (Grindcore songwriting ?)
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I can't really think of any off of the top of my head. But just look around on the internet... This site has a couple of bands on 'em that are good...
http://www.anus.com/metal/about/grindcore.html
http://www.anus.com/metal/about/grindcore.html