Brian Simmons and CentraSoft.com just released CF8 Exam Buster which is their exam preparation software for Adobe's ColdFusion 8 Certification exam. I used the ColdFusion 7 version to study for my ColdFusion 7 exam and passed with flying colors. After having done some Beta testing for the ColdFusion 8 edition, I am convinced that the new version is every bit as helpful as its predecessor. If you are thinking about getting certified, I highly recommend that you check it out.
I really like this software but for more than just the fact that it helps you pass the certification exam; I love that it forces you to look at aspects of ColdFusion that may rarely or never use. By providing you with hundreds of sample questions, you really get a great sense of all the features of the language that you have yet to leverage.