They might make nice chia seed jam too - but I have never tried that.
I tried that Chia seed jam with a punnet of raspberries that were going spare - what a waste of raspberries, was nothing like jam and all seeds as far as I could tell. I just have smaller amounts of jam now when I want it and can get away with it.
Redcurrants would make nice flavoured vinegar, you just have to let it soak for a few weeks, or there's a lovely ketchup-style sauce called 'Pontack' you could make with redcurrants instead of elderberries - the recipe says to leave maturing for 7 years, but I've had it after 6 months and it's great.
You could make a fruit schnapps. I don't think it would be good without actual sugar, but you probably wouldn't drink much of it at a time. I usually add 250g sugar to a 750ml bottle of alcohol plus the fruit,
Or you could just make jam, but with Truvia or something.