Recently I discovered a very interesting free energy generator by Jean Louis Naudin. It uses an induction heater and a flat bifilar Tesla coil ... and that`s it. Click on the link below :

The GEGENE : a Great Efficiency GENErator with a Tesla bifilar coil...

Input power - 1000 watts
Output power - 2800 watts.

I haven`t seen a system more simple than the GEGENE.

Have fun building it.