Can you take a name like pzizz seriously? Neither can I, but this product from England is serious about giving you some pzizzes (p for power nap, and zizz for the British slang for catching some zzz's).
The pzizz is software that creates soothing sounds that "combines Neuro Linguistic Programming techniques," aka, a guy's voice whispering to you, telling you subconsciously to go to sleep.
I don't have a sleeping problem, so listening to this in headphones was more distracting than comforting, yet I did get to sleep, so I guess it worked. It wasn't my cup of tea, but maybe it'll work for you. You can read my review here, or download a sample to try for yourself at pzizz.com.