Reasonable Faith (reasonablefaith.org/): William Lane Craig is somehow simultaneously an expert in philosophy, theology, cosmology, and historical Jesus studies. He is also a fearsome debater. One popular atheist writer complains
“Let me repeat. Craig has done 20+ years of Ph.D+ level research in the two fields he debates, [and] has published hundreds of academic books and papers on both subjects, and has been debating since high school. So yeah, that’s right. You [speaking to atheist worldwide] are not qualified to debate William Lane Craig.” [“How to Debate William Lane Craig,” [online at commonsensatheism.org]
Craig's site comes first for a reason. He is the only serious academic from the highest of the Ivory Towers who has successfully been able to come down and build a very popular apologetics ministry that layman can connect with. New apologetics enthusiasts may not be aware of this, but perhaps all of the apologist discussed below (as well as Lee Strobel, Ravi Zacharius, Greg Koukl etc. ) would likely admit that if Craig is ranked a 10 in terms of his knowledge base, they are ranked no higher than a 2 or 3. I know that sounds like an exaggeration; it's not.
The Christian Apologetics and Research Ministry (carm.org): Matt Slick's website is a good reasource for the beginning Christian Apologist, primarily for theology and counter-cult apologetics. He has a talen for simplifying concepts and writing in a professional yet engaging way. Christian must have their doctrine down right, and CARM is a great online way to learn it.
Reasons to Believe (reasons.org): Hugh Ross and Fazale (“Fuz”) Rana specialize in cosmology and biology respectively. Together they lead a team of scientists and enthusiasts, spearheading the discussion of science-faith and defending the scientific integrity of the Bible from a progressive-creationist “Old Earth” perspective. Like any of the sites above, I do not necessarily endorse everything written here, but more importantly, I do not recommend discussing evolution or Biblical inerrancy with non-believers. (At least, not until more important issues have been discussed first.) I include this website under recommended reading because no matter what I tell you you're going to end up talking about this stuff with people. This ministry is the best I have found in preparing you to talk about the Bible and science from an inerrantist perspective.
Tektonics (tektonics.org): J.P. Holding's website (tektonics.org) is perhaps the most invaluable among those listed here. Holding's specializes in New Testament studies, but unlike most knowledgeable researchers in this field, he has been willing to roll up his sleeves and devote much of his ministry to reading and responding to all the egregiously popular trash that makes its way onto atheist blogs, YouTube, and self-published books (stuff that academics don't take seriously). Holding then writes up scholarly responses that probably wouldn't exist without him, because no other scholars can stand to read and listen to these guys. Holding knows what it means to be an apologist in this regard, and I speak for many apologists when I say “we are so grateful.” In addition to this, Holding has done excellent work on the historical case for Jesus's resurrection and other topics related to Biblical studies.
The Christian Think-Tank (christianthinktank.com/): Glenn Miller's website (christianthinkthank.com) in many ways resembles tektonics.org. They both focus on history, both are top-notch researchers, both do pioneering work, and both have an endearing writing style. Miller, of course, doesn't understand the word "concise." His articles are more like long chapters, which draws a lot of complaints. Nevertheless, the kind of research Glenn has done, the thoroughness of his knowledge-base, and the comprehensiveness that characterize his treatment of topics make his contributions some of the most important to our field. [As a side note: Glenn's site today is more of a stagnant library because he was just not financially supported enough, although he never asked. Christians should have been throwing money at this guy to keep him researching and writing full-time, but that didn't happen and now the thousands and thousands of people that would have been benefitting from his unique work will go unserved.] Still, the site is a library of wonderful information that has already been published, and will be serving thousands of apologetics enthusiasts for the forseeable future.