I just posted this in someone else's thread, but I think it would be helpful to make a thread on it so everyone can see.
Subway Nutrition Calculator
Since each sub is so customizable, it's difficult to truly get a good measurement on what you take in. This thing calculated exactly what I had in my 6" sub today, and it made my job logging all those ingredients much easier

It doesn't just do subs, it does everything they serve.
Do you guys know of any others?