I've been at this for a while, and I'll be the first one to tell you that free weights should be the cornerstone of any workout program designed to maximize muscle size, strength and power.
That said, it's important to understand that machines and cables also have their place in any guy's fitness program. Even if you're a die-hard deadlifter, you can (and should!) take advantage of these machines, since they can isolate target muscles, decrease the need for balance and stabilization, and create a more constant tension through the entire range of motion.
Here are 7 excellent gym machines that will be worthy additions to your regular routine.