I've only ever seen Diet Rite Cola and not very often. President's Choice has some products that are sweetened with Splenda instead of aspartame - iced tea & some fruit flavoured drinks.

It's also a good idea to read labels on meat products. Call me cynical, but I like to check what's in them and am sceptical about carb counts, especially if they say zero. Watch out for sugar in all its disguises and filler such as toasted wheat crumbs (=bread).