The Nordic Hamstring exercise requires almost no equipment besides some sort of pad to rest your knees on. Sorinex makes a great device they call the Poor Man’s Glute/Ham Raise which is perfect for this exercise and only costs a few hundred dollars. As much as possible, try not to break at hips. You can also perform this exercise by only lowering yourself about 1/4 of the way down, stopping, then pulling yourself back to the top. Be careful with this, however, because a lot of people cramp up quickly because of the intense contraction of the hamstrings and calves to make this happen.
Dr. Tim Hewitt, a renowned expert in ACL prevention and rehabilitation has be given hundreds of thousands of dollars in research money to investigate ACL prevention. The Nordic Hamstring exercise is one of the staples of his program and it can be done by anyone, anywhere without any equipment. Great option for hamstring development.