Note that energy is always conserved, so basically, you can't find a "non-example". Here are some examples: In the Sun, nuclear fusion converts nuclear energy - a type of potential energy - into heat...
The are 3 examples i can think of. They are heat and light. I'm not positive but water might be one to.
heat, light, fireworks, MAYBE water
There is no known non-example. Energy is always conserved.
i dont no many but one is fireworks