Other
These are products other people have used successfully and have suggested to me. I have not used them and so cannot tell you anything more about them.
Feel free to add more in the comments below, or email them to me, and I will add them to this section. Thank you so much for helping to build up this list of resources!
Recent suggestions:
method brand, free of dyes + perfumes (you can search on their website for fragrance, including fragrance-free -- very cool!)
Fabric softener for dryers
dryer balls