I use Fitday, which I like because of its simplicity. The downside is that I have to input a lot of custom foods because the food list is not that comprehensive.
I use Daily Plate to log all my calories for the day, but according to that site, my caloric limit is around 2300 -- I keep my number lower than 1600 but still use the Daily Plate because it has nutritional information for a lot of foods.