There are several books and even courses to help prepare for the FE Exam. However, some of this material can get kind of expensive. I found collection of videos for reviewing some of the material that you would find on the test. These are older review videos made available by Texas A&M.
All of the files are in a Real Media format which isn’t really popular or supported anymore. However, you can successfully convert them to other formats using http://www.convertfiles.com/ or some other tool. There are even PDF notes made available. These videos will give you a nice review of some of the general subjects like Chemistry, Economics, and Statistics with the information presented with the FE Exam in mind. It may take some effort to get the large files downloaded and converted, but it is a nice resource when preparing for the exam and its totally free.
Link to the video downloads page here.