ThriftyFun is one of the longest running frugal living communities on the Internet. These are archives of older discussions.
Epsom Salts as Fabric Softener
Using Vinegar as a Fabric Softener
Making Septic Safe Laundry Detergent
Fabric Softener Dispenser Won't Drain?
Using Liquid Fabric Softener Instead of Dryer Sheets
Finding a Substitute for Washing Soda