For lo-cal snacks, I like olives or dill pickles mixed with carrots or celery. The pickles are high in sodium, but are particularly good if you are an athlete in the summer months as they help to replenish some of what you lose in your workouts. Carrots and celery get a bit dull, but there a hundreds of flavors of olives and dill pickles.
also, here in Pennsylvania-Dutch country, there is a particularly good lo-cal food called Chow-Chow...it is really just carrots, onions, celery, cauliflower that has been cut up and pickled....again, high in sodium but ok in moderation and replenishes some of what you lost during workouts.
--Barry