I use this one all the time: http://zzz.330.ca/progz/zflsh.shtml
Usually when I'm stoned. Sometimes I use it as a strobe light to go along with some fast techno/electronica, sometimes I'll just zone out if I can't sleep.
Inferius Reviewed by Inferius on . brainwave generator if you have ever used one of these, i would like to know if it worked for you. its definetly working for me. it makes you go into a sort of sleep-like state where your body does what it wants. Rating: 5