Some more I thought of, by no means a comprehensive list though. Just what I've read on the subject that appealed to me as I was studying anarchism as a political philosophy.
Statism and Anarchy by Mikhail Bakunin
Anarcho-syndicalism: Theory and Practice by Rudolf Rocker
Mutual Aid by Kropotkin
Trotsky discusses anarchism in Marxism and Ararchism
Nestor Makhno has some interesting writings
Chomsky is good
Émile Armand has some good writings on Individualist Anarchism (he's very anti-conflict though, which I tend to disagree with)
Lastly, something I would strongly recommend if you're new to anarchist thought and philosophy is Anarchism: Arguments For and Against by Albert Meltzer.
I am leaving out tons of great writings and writers/philosophers/theorists (and theories)/poets/etc...
There is a lot out there. Let me know if you have any questions!