I use an application called Calories, it has about 6500 types of foods and combos that you make a meal for. Gathers what you eat for 3 meals plus a snack and tells you how many calorie intake you have to watch your weight. Cheers
Just downloaded the demo ... not exactly what I was looking for, but great nonetheless. I might just purchase it for completeness' sake.
I was looking for software that lets you input your weight every day and lets you set a goal weight etc ... maybe even calculate your BMI on a daily basis etc ...
I'd tend to think, also, that most of the best apps for this are on the web. I really like Livestrong.com (I was not using it for weight management, though... I briefly used it because I needed some help lowering my sodium consumption).