A splitting maul is a wonderful tool for splitting fire wood, posts, rails, etc. Most log splitters will only split very short logs, are very slow, burn a lot of petroleum, make a lot of racket, pollute your lungs, and break the bank. A splitting maul is versatile, as fast as you want it to be, great exercise, allows you the excuse to get some fresh air, and can be had used for a dollar or three without a handle.
This article explains what a maul is and is not. Note the photo showing a good edge angle for a maul.
maul vs. axe