Positive Atheism's Big List of Quotations 
Quotations by authors, political and religious leaders, scientists, comedians and philosophers.
http://www.positiveatheism.org/hist/quotes/Atheist Empire - Great Minds
Collection of quotes pertaining to religion, spirituality, atheism, and disbelief.
http://www.atheistempire.com/greatminds/
Atheist Quotes
Quotes relating to skepticsm of religion and persecution for not thinking with the majority.
http://www.anzwers.org/free/quotes1/
Atheism Quotes
A collection of quotations about atheism.
http://www.notable-quotes.com/a/atheism_quotes.html
Great Minds
Inspiring quotes from the minds of humanity's greatest thinkers.
http://borsippa.com/greatminds/
