Stand to Reason: A great website with numerous resources.  The site is updated daily.

The Christian Apologetics Alliance: Numerous contributors covering a wide range of topics.  The site is updated regularly, but not daily.

Reasonable Faith: The website of William Lane Craig, who some may consider as the prince of Christian apologetics.

Ravi Zacharias International Ministries: The website of Ravi Zacharias.  A brilliant man with a quick wit and remarkable communication skills.

Cross Examined: The website of Frank Turek’s ministry.  I have particularly enjoyed the weekly podcast.