Priza Technologies Inc, a small Silicon Valley company has been able to create method and technology to harness zero point energy. This means that they can create energy without any fuel, from nothing. They are running a crowd funding campaign to raise funds to take this technology to the market at: http://www.indiegogo.com/projects/z-point-energy-biggest-discovery-of-science
The concept of zero-point energy was developed in Germany by Albert Einstein and Otto Stern in 1913, as a corrective term added to a zero-grounded formula developed by Max Planck in 1900.
Zero-point energy, also called quantum vacuum zero-point energy, is the lowest possible energy that a quantum mechanical physical system may have; it is the energy of its ground state. All quantum mechanical systems undergo fluctuations even in their ground state and have an associated zero-point energy, a consequence of their wave-like nature. The uncertainty principle requires every physical system to have a zero-point energy greater than the minimum of its classical potential well. This results in motion even at absolute zero. For example, liquid helium does not freeze under atmospheric pressure at any temperature because of its zero-point energy.
Priza Technologies has proposed a more complete space-time theory named as "neo unification theory", using which they have come up with a method to harness zero point energy.