Bitelog.com is a food diary.
It lets you write down your food intake and calculates your calories, vitamins, proteins, carbs, fats and minerals.
You can see your vitamins, calories and all the others daily, weekly or monthly. This really helps one get healthy eating habits.
You can also search and compare lots of food items for their nutrients.
Which food and how much of it gives you the specific nutrient you need? You can find out in less then a second! I always wondered which oil is best for getting the good fats or what should I eat to get more Potassium. Now I can even compare the foods and decide.
It also lets you enter your own favorite hard-to-find-elsewhere food which is only in your country or market.