The Yoak training system is one of the most versatile and effective strength training tools I've used.  It takes advantage of oscillating kinetic energy and applies it to standard barbell movements as well as bodyweight exercises.

If you’re looking for an all-in-one exercise to crush your entire core and hips as well as many of the stabilizers throughout your body then you’ll want to try this single leg anti-sliding weighted plank on the slide-board,

If you’re looking for a full body stabilization drill that not only taxes the core and shoulders but also acts as a dynamic warm-up and conditioning tool, try this dynamic marching inch plank.  You'll also find it to very useful to add before squats and deadlifts.