I know you asked for calorie free, but I don’t know of any except stevia. I love using agave nectar or raw sugar. You can try doing an Internet search for vegan sweeteners or vegan calorie free sweeteners and see if anything comes up!
Ah, wait – correction. This should be the right information on Sweet’n Low:
“In Canada, Sweet ‘n Low is made from sodium cyclamate instead of saccharin. This is because saccharin has not been allowed as a food additive in Canada since the 1970s, when studies surfaced showing cancer resulting in laboratory rats that had been administered the additive. Canada is considering lifting this ban since the studies were recently proved faulty, and several other countries have lifted their saccharin bans and warnings.”
In any case, @Dagmar, aspartame is in NutraSweet and Equal.
“Be careful with SweetN’Low. It’s been blacklisted in Canada because it can cause cancer. Look up Aspartame.”
Most of the sweeteners I see on the market no longer use aspartame, though I’d say Maltitol is common, which is fairly safe.
Also, many products are licensed by the same name but use different artificial sweeteners dependent on which country they are in, much like oreos in the UK have a different recipe than oreos in CAN or US.
From what I know, Canadian Sweet’n Low uses Sodium Cyclamate. I hear it was banned in the US because of a study that’s now debunked, though I’m not 100 percent sure about the validity of that.