Best Chest Exercises: Dips
Parallel Bar Dips are great for shaping and building mass in the entire pectoral region. Grasp the handles of a parallel dip apparatus and hold your body suspended between them. For primary training emphasis on your chest, lean forward as you perform this exercise (holding your torso erect puts primary resistance on your triceps). Inhale as you lower yourself as far down as you can comfortably descend and then exhale as you push yourself back up to the starting position. This exercise is a great bodyweight chest builder as long as you watch your technique and lean forward throughout the movement.
For an overload effect or to pyramid your work sets, use a harness to hang a barbell plate or dumbbell from your waist for added resistance. Most commercial gyms and some health clubs have these harnesses, so if you need one, ask for it.