Here's a useful site that's similar to Cast Iron Chaos, in that it provides links to useful skepticism, free-thinking, and critical sites on the Web. However, it only provides links to the skeptics' sites…it doesn't review the kook sites, the way we do here. However, many of the links listed here are well-developed and deserving of a look. You're likely to find something of interest here that you didn't know about before now.