>ballistic calcs
If you know the specifications of your gun and ammo, then I've found the Android program Strelok both very useful and quite accurate. For ballistic coefficients, you often have to do that math yourself (there's a formula which is not too hard to use), but for normal profiles of rifle and pistol bullets there are a couple web-based estimate calculators available that will get you basically within 1 SD of your needed figure in most cases, barring funky projectile types like ballistic tips, hollow based bullets, etc. Just do a web search and try the ones you see, I forget which one I personally like for rifle ammo.
>load and pressure data
There is no automation here. You need to either get your loads from someone with experience or be able to crunch the numbers longhand based on the factors unique to your gun and ammo, down to what type of action you're using. The same cartridge will have different pressure curves in different guns. Seating the bullet 1 mm shallower or deeper can change the pressure curve substantially. Do not take shortcuts with this if you're trying hot or unorthodox handloads, got it?