There are 1 repository under lorentz-transformation topic.
A small Haskell/Clojure/Python/C++ Library of Special Relativity functions for length contraction, time dialation, spacetime interval, lorentz transformations and etc.
I volunteered to make an applet that has 2 graphs. On one you can click stuff and on the other one the lorentz transformation of the point that you clicked is shown. You should be able to see the cosmic lines in this
Electron-positron pairs beaming in the Breit-Wheeler process