Of those listed, I can vouch for iSnipe. It's a good program and lets you see average performance of just about every factory load available for just about any caliber. You can also input your handloaded ammo bullet type and velocity to give you rough calculations for windage and bullet drop. It's not pinpoint accurate, but it got me on paper at 500yds, no small feat for me.
"To preserve liberty, it is essential that the whole body of the people always possess arms, and be taught alike, especially when young, how to use them." -Richard Henry Lee, Virginia delegate to the Continental Congress, initiator of the Declaration of Independence, and member of the first Senate, which passed the Bill of Rights.