Zero-X, makers of BeatCreator and TrackCreator offer this FREE Trial.

If you aren't quite sure how a tool like this works, or what you can do with it, take advantage of the Demo to try things out first. You will not be able to save anything you work on, and a number of features will be disabled, but you will be able to experience and experiment with all the basic slicing, beat editing and loop creation power, that these two programs provide. See the FAQ section for more info about both products.