salad dressings

I like Renee's Asian Sesame (45 cal/Tbsp) and Sweet Onion (40 cal/Tbsp). They have lots of flavour. I like my dressings runnier than these and add some water to give them that consistency. That still leaves them with a lot of flavour and probably brings them to the calorie count you are looking for.
http://www.renees.com/en/Products.aspx?c=Dressings#anchortype_Vinaigrettes

Bragg's apple cider vinegar and olive oil (1 part cider to 3 parts olive oil). Sometimes I'll add a teaspoon of stone ground mustard.

I use presidents choice balsamic. it's 45 cals per tbsp but I only need half for my salads.

I know that this isn't really an answer to your question but I add fruit to my salads and that eliminated my need for dressing. It provides enough flavor and sweetness that it works

I actually replace salad dressing with cottage cheese-- it has protein and is waaay better than salad dressing, though it is more filling.

Bolthouse Farms and Ken's have really good dressing that are low-cal but don't taste like it. Ken's French is amazing.

If you dip your fork in dressing instead of pouring it on your salad, you will eat much less.

Good luck!

I know that this isn't really an answer to your question but I add fruit to my salads and that eliminated my need for dressing. It provides enough flavor and sweetness that it works

Oooh! I like the sound of this! Thanks for the tip!

I really enjoy Kraft's Light Asian Toasted Sesame Dressing, it is 50 calories for 2 tablespoons and it doesn't taste like those other "Light" Dressings.

I often make my own by blending balsamic vinegar and a bit of apple cider vinegar with....

Roasted red peppers, garlic, roasted onions

or

Salsa

or

Roasted red peppers, lime juice, garlic powder and chipotle powder

or

Thai Chili sauce

all with a bit of salt to taste and water for consistency

Kraft lite balsamic vinaigrette. 25 calories per serving, and I'm having it on a giant salad of romaine, red & green chopped apple, chia seeds, a sprinkle of chopped walnuts, a sprinkle of Craisins, raspberries, low-fat blue cheese, a bit of cooked chicken and red onion. Panera's low-fat or fat-free poppyseed dressing is really good too, especially on salads with strawberries and blueberries. Both of these dressings are runny so a little goes a long way. Whisking a bit of honey into a balsamic viniagrette gives a rounder flavor and texture to the dressing, too.

Panera used to have a blue-cheese vinaigrette on their Chopped Steak salad, which they discontinued. I loved it, and that's where I got the idea of whisking a little something creamy into a vinaigrette dressing, when I have the time. Alternatively, you can dampen your salad with a specialty vinegar, and then use a creamy dressing that will go farther. You might want to try white balsamic, rice wine or malt vinegar to get a mild flavor you like.

A restaurant near me made a maple-based salad dressing on a tropical salad with coconut and pineapple. It was a temporary special but I loved it. I've never found a dressing like this in a store and I've tried to duplicate it but couldn't. That dressing will haunt me forever.