Flight planning tools - Data foundation
Many of the modern flying apps like Foreflight do most if not all of these calculations for you once you have programmed your aircraft parameters in. As mentioned in my answer to your other question a good deal of this data is specific to the plane. W&amp;B is specific to every aircraft and will vary depending on how the plane is setup. Things like takeoff performance and fuel burn are generally similar for an airframe but since some aircraft have multiple propellor or engine configurations available there is a variance in the numbers. Foreflight allows you to program in climb, cruise and decent fuel burn and will calculate fuel usage for you. If you have target airspeed (climb, cruise, decent) in it will calculate time en-route for you, and you can select your altitude for wind/heading calculations. The only thing I'm not sure foreflight does is takeoff distance (yet). 

I have not spent any time behind a G1000 yet but I am under the impression that the various newer glass panel options can do some of these calculations as well. 

Larger aircraft have FMS systems to aid in a great deal of this once you get out of the GA world.  

You could try and digitize some of the functions within some of the more common POH's (C172, the various Cherokees, C150 etc) but that would not technically be legal for flight since its not the POH for the specific airframe.