Low Sodium, Low Calorie Salad Dressing

I live in a dorm so I love hitting the salad bar.  However, I hate the amount of sodium in low fat ranch.  My other healthy options are light balsamic vinaigrette (which is more calories than the ranch and a ton of sugar) and balsamic vinegar with salad oil (if I hound the staff to refill it for me).  I'll probably start petitioning for olive oil but I doubt they'll get it because of the cost.  Everything here is so salty especially if it's low fat.  Any ideas about how to avoid sodium?

I just use apple cider vinegar with some stevia mixed into it, or plain balsamic vinegar....I skip the oil when I want to keep it really low calorie.

-squeeze lemon/lime/orange juice on top

-mustard

-salsa

>> load up with lots of flavorful veggies, pickles, olive, hot pepper rings, or a sprinkle of strong cheese like feta... you won't even need dressing!

Choose full-fat dressings. No reason to go low-fat when it comes to salad dressings. Your body needs fats to absorb the vitamins in the salad.

really??