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EFTofPNG (Effective Field Theory of Post-Newtonian Gravity) performs high precision computations in the effective field theory of post-Newtonian (PN) Gravity, including spins. Written in Mathematica, it provides computer-algebra tools to derive analytical input for gravitational-wave source modelling relevant to current observatories. EFTofPNG has been used to derive of all currently known spin-dependent conservative interaction potentials in the post-Newtonian (PN) approximation to General Relativity (GR).