just remember this list is by no means inclusive of all the OWL foods you can eat on a given rung. Nor does it mean you have to eat these foods during the Rung either.
There are a number of websites with nutritional info in addition to fitday.com. Here are two others that I use:
USDA Nutrient Database
http://www.nal.usda.gov/fnic/foodcomp/search/
Calorie King
http://www.calorieking.com
If you like books, I like
The Complete Book of Food Counts by Corrine T. Netzer.