Yes to sugar-free jello. Here, read this list:
Free Foods: (taken from Medifast Lifestyles book)
A free food is any food or drink that contains less than 20 calories or less than 5 grams of carbohydrate per serving. Foods with a serving size listed should be limited to 3 servings per day. Foods listed without a serving size can be eaten as often as you like.
Fat free or reduced fats:
Cream cheese, fat-free 1 Tbsp
Creamer, nondairy, liquid 1 Tbsp
Creamers, nondairy, powdered 2 tsp
Mayonnaise, fat-free 1 Tbsp
Mayonnaise, reduced-fat 1 tsp
Margarine, fat-free 4 Tbsp
Margarine, reduced-fat 1 tsp
Miracle Whip, nonfat 1 Tbsp
Miracle Whip, reduced-fat 1 tsp
Nonstick cooking spray
Salad dressing, fat-free 1 Tbsp
Salad dressing, fat-free, Italian 2 Tbsp
Salsa 1/4 cup
Sour cream, fat-free, reduced-fat 1 Tbsp
Whipped topping, regular or light 2 Tbsp
Sugar-Free or Low-Sugar Foods:
Candy, hard, sugar-free 1 candy
Gelatin dessert, sugar-free
Gelatin, unflavored
Gum, sugar-free
Jam or jelly, low-sugar or light 2 tsp
Sugar substitutes*
Syrup, sugar-free 2 Tbsp
* Sugar substitutes, alternatives, or replacements that are approved by the Food and Drug Administration (FDA) are safe to use.Common brand names include:
Equal (saccharin)
Sprinkle Sweet (saccharin)
Sweet One (acesulfame K)
Sweet-10 (saccharin)
Sugar Twin (saccharin)
Sweet 'n Low (saccharin)
Drinks:
Bouillon, broth, consommé
Bouillon or broth, low-sodium
Carbonated or mineral water
Cocoa powder, unsweetened 1 Tbsp
Coffee
Club soda
Diet soft drinks, sugar-free
Drink mixes, sugar-free
Tea Tonic water, sugar-free
Condiments:
Catsup 1 Tbsp
Horseradish
Lemon juice
Lime Juice
Mustard
Pickles, dill 1-2 large
Soy sauce, regular or light
Taco sauce 1 Tbsp
Vinegar
Seasonings
Be careful with seasonings that contain sodium or are salts, such as garlic or celery salt, and lemon pepper.
Flavoring extracts
Garlic
Herbs, fresh or dried
Pimento
Spices
Tabasco or hot pepper sauce
Wine, used in cooking
Worcestershire sauce
This comes from a post at this thread:
http://www.makemethinner.com/forum/viewtopic.php?t=566