What is the Best Evidence for Over-Unity?

I received a suggestion and a request from an ECW reader for a thread to discuss the question of what is the best evidence that over-unity energy production is real.

“Is there acceptable proof for this? Could readers of your site put up the best evidence of over-unity of any kind, accepting that so far they may only be proofs of an effect that cannot be maintained or commercialized at present.

It would be good for us all to see the best experiments that confirm there is something that is a positive reality to keep our spirits high.”

I think it is a good question to discuss, and I will be interested in responses, if any. Thanks!