Cashews and peanuts are quite high in carbs compared to other nuts, so are chestnuts. Husband came home with some cashews from Tesco recently, which were 24g of carbs per 100g.
I don't bake with lower carb flours (a) because I am not a cake or biscuit eater (b) because I'm unconvinced that the human body can differentiate between carbs and go "mmm yes this is the low carb coconut flour with Stevia " rather than just "sweet, send for insulin"
I don't snack much but if there are organic black or red grapes in the kitchen, I might steal a few. Ditto strawberries with a big helping of cream.
When out shopping with my mother, my go to snack is a pint of shell-on wild Atlantic prawns. If I can find them, I might buy chilli Hogbites pork scratchings. At home I used to have Lindt Excellence 90% cocoa chocolate, spread with organic 100% peanut butter but I seem more sensitive to anything sweet now and don't like the taste so much.
My piggiest snack is a 100g tub of Rachel's organic luxury creme fraiche which has 2.7g carbs 2g protein and a whopping 40.3g of fat