The rack deadlift is great for lifters with less range of motion, but can also be used to work the top range of the deadlift with a heavier load.
Typically, the rack deadlift is set up with the bar just below the knees, but just above the knee is fine too. If you don't have a rack, use a few 45 pound Olympic plates to elevate the bar into position.
Whether your goal is to build an amazing physique, a record deadlift, or simply put slabs of muscle on your lower back, try out a few of these exercises.