Splenda is banned in some countries - Germany for example. There must be a reason for it...
Again in Germany, fructose is usually used to replace sugar in diabetic recipes, albeit in lower quantities than "normal" sugar.
Using pectin instead of sugar doesn't work; pectin needs both sugar and acidity to make the jam set.
Most commercial sugar free "jams" that I've come across (by law they mustn't be called jam unless a certain percentage, I think 50, is sugar!), are high on concentrated grapejuice. I am going to try that out myself - when and if I can get the grapejuice concentrate! But you can use concentrated apple or pear juice, as in one of the recipes above, it's just not quite as sweet as grape, and ity has a more distinct taste of it's own, so the jams don't come out as clear in taste as you might want them to.
I have made plum "jam" just with fruit; it needs to be boiled on a very low heat for ages, so great if you have an Aga going anyway and can hang about for a few hours to give it a stir occasionally. Otherwise I think the input in energy and time doesn't really justify the result. Also, I've not had that many plums for many years. But it is nice, especially with a few spices added (cinnamon, cloves), and some lemon juice. My aunt used to swear by adding a green walnut.


