Here is an advanced exoskeleton developed to help disabled people walk. TWIICE developed at EPFL allows people with paraplegia to stand up, climb steps, and do a whole lot more.
This walking assist device is expected to be used at the 2016 Cybathlon. TWIICE is lightweight and has hip and knee joints that are flexed and extended by two electric motors per leg. It has buttons on the handles that let you set the pace. More info is available here.