Everything you need to design, simulate and fly better rockets OpenRocket is a free, fully featured model rocket simulator that allows you to design and simulate your rockets before you build and flying them.
Trajecstory is a program to plot trajectories of an electron in electric and magnetic fields in three dimensions. For students of Physics, the utility of such a program is immediately obvious, and no further explanation is required. For others, it has no utility, and further explanation is pointless.
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