Are there good over-the-counter sleep aids that aren't addictive?

Melatonin. Depends on what part of sleep cycle affected if it is falling asleep use melatonin. If staying asleep either glutamine 100mg or trypophan as 5htp or neuro htp. Usually sleep issues are due to gall bladder not working well. Check and try to do liver gall bladder flush and see whether this works. If you have gall bladder issues use magnesium 800mg - to avoid tummy cramps start with 400mg.
Hype??? There are so many sleep aid marketing ads out there that it is hard to know which otc aids are effective and safe. There is so much hype, and the effectiveness from one person to another may depend on age, sex, weight, and other factors. One great sleep success otc product for one person may be detrimental to another. Research unbiased websites for info, like consumer reports. Read the labels.