Muzzle Energy Calc & Power Factor Calc support complete data/state transfer between them. On both pages there's a link that switches one calculator to another. That means  you can enter the data in one of those two applets, draw the graphs & then click the Switch link above the applet & go to the other one. All the data entered, working mode & the current element number will be transferred to the calculator being loaded.
Muzzle Energy Calculator/Graph Builder  Calculator that builds a graph by calculated bullet muzzle energy using the bullet mass and the velocity. You also can enter several bullet masses and draw the comparison graphs, just in case if you want to visualize different loads this way. 

Power Factor Calculator/Graph Builder  Very similar to the previous one, but the formulas used are different. Gives a different picture for the same rounds. Many people prefer this one. 

Recoil Energy, Impulse & Velocity Calculator  Calculate Recoil energy, impulse & gun free velocity by the bullet, gun & powder charge masses & muzzle velocity. Gunpowder type (blackpowder or smokeless) also accounted. Both UOM systems: English & Metric are supported, including value conversions. 

Shotgun Recoil Energy, Impulse & Velocity Calculator  Calculates Shotgun Recoil energy, impulse & gun free velocity by the bullet, wad, gun & powder charge masses & muzzle velocity. Both UOM systems: English & Metric are supported, including value conversions. 

Stephen RicciardelliChris Hayes