I have been a fan of this sauce for YEARS!
It's sugar free and gluten free, and has 2g net carbs per serving of two tablespoons. Super useful for ribs, sausages, dips, and lots more!
You can buy Original or Sweet Thunder flavors from Amazon.
However, it's cheaper at Netrition, and as well as these two varieties they also offer Spicy (my favorite!), Smokey Bacon, and Smokey Garlic!