Gospel Gazette: Causes of Unbelief
Discusses why some people are atheists, and suggests that the implications of atheism are harder to believe in than God's existence.
http://www.gospelgazette.com/gazette/2000/nov/page17.htm

Creation and Revelation: The Unreasonableness of Atheism and Other Barriers to Belief
Sets out and responds to fifteen reasons for unbelief often cited by atheists.
http://ourworld.compuserve.com/homepages/rossuk/c-athism.htm

Leadership University: The Psychology of Atheism
Turns the table on those who attempt to explain away religious belief as mere wishful thinking, arguing that atheism is just as vulnerable to this kind of critique.
http://www.leaderu.com/truth/1truth12.html

Reasoning from the Scriptures Ministries: Strategies for Dialoguing with Atheists
Highlights two difficulties with atheistic belief: that it goes beyond the evidence in denying God's existence, and that without God morality lacks a foundation.
http://home.earthlink.net/~ronrhodes/Atheism.html

KiwiCatholic: Consequences of an Atheistic Philosophy
A response to the criticism that religion is associated with evil behaviour. Argues that atheism has not only led to moral atrocities, but also makes it impossible to criticise acts as immoral.
http://homepages.paradise.net.nz/mischedj/ca_atheism.html

CARM: Atheism
An examination of atheism, pros and cons. Observations regarding ethics, behavior of atheists, and errors in reasoning, both for and against belief in God. Arguments for belief. Christian Apologetics and Research Ministry site.
http://www.carm.org/atheism.htm

Challenging Atheism
Rebuttals of common arguments for atheism. With "The Deep End" discussion forum for dialogue between theists and atheists.
http://www.challenging-atheism.com