I am not sure about sites.. but I can tell you some cookbooks!! You might be able to barrow them from your library and get some through there.
The New American Heart Association Cookbook
Weight Watchers New Complete Cookbook
The South Beach Diet Cookbook
I don't do WW or SBD. But I have there cookbooks from when I did follow those plans. There are some good recipes in them. I have some of them on my web site but I forgot to put the nutrition info. on them because calorie counting is new for me. I hope to do that soon though.
Here are some guesses of recipe sites (I have been on these sites before) but not sure about NI info.
http://allrecipes.com/
http://www.bettycrocker.com/
http://www.calorieking.com/
http://www.foodnetwork.com/
http://www.foodnetwork.com/food/cooking/0,,,00.html
http://www.splenda.com/index.jhtml
Check out the food network ones... there is tons of good stuff in there!