Lets open the discussion a little wider, not merely limited to kosher interpretations of alternative energy and (((Eisensteinian))) physics.
Scalar physics is the new paradigm, here is a research center with several very insightful very engineer oriented papers by folk who've spent decades in the field.
Another fantastic new paradigm resource is the Electric Universe aka the Thunderbolts Project
I recommend starting with Thomas Minderle's papers and then Tom Bearden's. Also the montalk site is a gold mine, and not just for physics but metaphysics too. There is also 2 science sections, one is research notes, and the other is here
Furthermore and now getting into (electro-)gravitics in more earnestly
"How I Control Gravitation" by T.T. Brown -- Science & Invention (August 1929)
There is also a lot of great material on many other over unity technologies, however when the site got converted a lot of content got lost or otherwise made difficult to find -- for this reason I recommend the way back machine/internet archive to access the pages, here are a few
Moreover if you wish to dive further into gravity/inertial propulsion/power transmutation-extraction, this is a good book:
Secrets of Antigravity Propulsion: Tesla, UFOs, and Classified Aerospace Technology by Paul A. LaViolette Ph.D.
And even without getting too exotic you have just geometric based applications of
>Viktor Schauberger is known affectionately by the title water wizard, originally a naturalist and forest warden, discovered many secrets of water and designed many many revolutionary things, pioneering the application of the vortex by simply observing nature and applying what would now be called bio-mimicry, to create super efficient flumes capable of floating not only logs thought to be too big but metalic ores too, insight into perpetual motion and the process/geometries nature uses to sustain and renew itself, spiral ploughs that appropriately charge (and not discharge) soil when tilling for maximum culturing of the micro life within, a great number of other unique things centering around the peculiar properties of water at it's critical point of 4C such as super efficient pipes and other restructured water applications.
Here's some more misc links for those who wish to dig more.
is the current address now.