I was looking for a way to save time in the mornings. While in the store I saw a product that said it would get wrinkles out of clothes. This product is called Downy Wrinkle Releaser. I bought a bottle and took it home and tried it on a variety of materials.
On heavily wrinkled cotton clothing this product is probably going to be a waste of time and money as this product is a bit pricey for the number of uses you get out of a bottle. However, the bottle does say that Downy Wrinkle Releaser can be used to help make ironing easier. You just spray a little on the fabric and iron.
On less wrinkled cotton material for casual wear it works fairly well. It's not a substitute for ironing if you are going somewhere where you need to look presentable. However, on cotton knit (jersey material) shirts it works pretty well and will save me time in the long run as a lot of shirts of mine are made of this material.
I have not tried it for this use but it says you can use it to reduce static cling.
Of course with all such products if you have a fabric that is prone to water spotting such as rayon or silk you would need to test on a hidden area before using.
Overall, a product that I would use on occasion but I don't think it will be a substitute for ironing completely.