Low Sodium Salad Dressing Options?

Ok does anyone know of any low sodium salad dressing options that taste good (and are low in calories and fat too - am I asking too much?) Seriously though..... I'm happy to make the dressing at home if need be, I don't mind.... But the sodium in bottled salad dressings that I can find is ridiculous!! My favorite is ranch, but I'm open to others. Thanks in advance!!