Review and status of reported innovative energy conversion technologies, contrasted using a consistent R&D ranking scale

A summary review and status is presented of the experiments, motors, generators, devices and demonstrations that have been reported in the past several years to produce near-unity or over-unity operation. The concepts of free-energy, zero-point energy and over-unity devices are not new, and many examples of such devices have been built within the last 100 years. Several devices are reviewed and ranked by a consistent research, development and commercialization ranking scale. Those devices nearest to commercialization are identified and summarized. Whether new forms of potential energy can be demonstrated and successfully utilized within the near future for the ultimate benefit of the human race remains to be seen.