Universal pectin,no sugar

"Pomona's Universal Pectin" is a sugar-free, low-methoxyl citrus 
pectin that is activated by calcium. Since it does not require 
sugar to jell, jams and jellies can be made with less, little, 
or no sugar. Some other possible sweeteners are honey, fructose 
powder, sucanat, concentrated fruit sweetener, maple syrup, 
agave nectar, frozen juice concentrate, stevia, xylitol, 
Splenda, and other artificial sweeteners.