My responce to these kinds of projects (to the people that actually believe it) is very simple.
I dont believe it, there is only one way to change my mind. For the device (that dooesnt use magnets (ie the device isnt using up the elctromagentic energy in the magents)) build a device that only uses the energy from a wieght on a string rotating round a motor (not a battery) to start the device. You get to call it free energy when the device can rotate a motor to pull the wieght back up a string and further.
If it contains magnets the magnets have to still be able to pick up a paperclip from a pretermined height, ie all the energy has been disappated
Nobody has managed that yet. Mostly I have very little patience for people that havent looked into acutal physics, for example seem confused when I ask them to account for the energy that is ommited through heat or noice.
The closest anybody came was they created a motor type arrangement, and it actually worked!

He put no energy in other then flipping a switch and the motor started and it light a lightbulb very well. Something was wrong though, it was easy to spot, he had used a huge capacitor (relatively) and funny enough it didnt work once I had discharged the capacitor.
For those that have thought about it I mostly reccount that Ive had similar thoughts about this kind of thing, when I was 12, in science class I drew a similar device that I imagined could hang in space, held in place by magents to remove friction that when could spin freely, the free spinning disk could hold magnets that would rotate forever generating electricity.
Simple huh? I thought so, I did some doodles and way worrying about getting the energy back to earth until I show it to my science teacher. She simply explained that magnets had magnetic energy like other forms of energy and that they could be used up. I hold her I didnt believe her, so she quite simply picked up a magent and hit it with a hammer quite alot.
The magnet wouldnt pick up any more paperclips, the magnetic energy had transfer into sound and heat amongst other things.