Mixed grip: Hold the bar with one palm facing the body, the other palm facing away.
Towel pull-ups: Place a towel over the bar and pull your body up by gripping each end of the towel.
Windshield wipers: Instead of pulling straight up, pull up and to one side, then bring your body across to the other side.
Hangs: Pull up until your elbows are at 90 degrees and hold the position.
L-sit pull-up: Start in a regular pull-up position, then straighten your legs out in front of you and perform a pull-up with legs extended.
Kipping pull-up: Swing the legs and use your body weight to assist in the pull-up motion.
Muscle-ups: Complete a pull-up and then extend your body above the bar into a finished dip position.