Christian Apologetics & Research Ministry
This site provides a solid introduction to apologetics, and is particularly useful for information about various cult groups.

Covenant Media Foundation
Apologetics information from a Christian perspective.

The Academy of Christian Apologetics
This site, representing a defunct educational institution, features a host of articles on Christian philosophy and apologetics.

The Center for Reformed Theology & Apologetics
A Calvinistic website offering apologetics resources from a strict Westminster perspective.