[P3DFFT Home Page: Scalable Spectral transforms in 3D - P3DFFT P3DFFT is an open source numerical library for high-speed scalable spectral transforms in 3D. It is intended for codes running on High Performance Computing (HPC) platforms (also known as Parallel Computers, Supercomputers). This includes 3D Fast Fourier Transforms (FFT) and certain other algorithms. ]