Geothermal - Drill a deep well. Use a refrigerant that boils at low temperatures but above ambient air temperature. Run a small turbine like Tesla Turbine. And you will power a small community till everything wears out. Or you can even go with a sterling engine. With a 50° difference you can get a house's electric worth.

(these have been blocked from anyone without govern-cement approval even researching it)

Wave - Basically build a giant paddlewheel, size of a Ferris wheel. And you have power with every wave that crashes to the shore.

(these have been blocked by all the "green peace" protesters cause they will look bad.)

Magnetic Motor - Yes these exist, but need some big money engineering put into them. They spin, but not enough torque to power a typical genset.

(people say that perpetual motion machines don't exist)

Real Solar - photovoltaic panels are really easy. Just plug them together and they go, but they are not very efficient. And quite expensive. We can use much cheaper mirrors and metal pipe and power a sterling engine or a turbine or a piston steam engine.

(every time The US funds one of these ever 20 years, and then pulls the plug just before it starts producing)