UPDATE 6/2018: As with most TGTBT claims, this company has long been defunct. https://en.wikipedia.org/wiki/Steorn
The Steorn company claims to have developed a limitless free energy technology. They state on their web site they “…have developed a technology that produces free, clean and constant energy.” They are a little evasive about how it actually works and also say that no scientists they have approached would go on record as saying the technology works. The web site says that the technology evolved during the development of “micro generators.” My hunch is that this nano technology may seem to provide the energy at the molecular level but has yet to see a feasible way to expand it’s energy production to a level needed to power something. Or I could be completely wrong, anyway you can explore it yourself if you find this…something of interest.