PARAVT: Parallel Voronoi Tessellation code
  We present a new open source code for massive parallel computation of Voronoi
tessellations(VT hereafter) in large data sets. The code is focused for
astrophysical purposes where VT densities and neighbors are widely used. There
are several serial Voronoi tessellation codes, however no open source and
parallel implementations are available to handle the large number of
particles/galaxies in current N-body simulations and sky surveys.
Parallelization is implemented under MPI and VT using Qhull library. Domain
decomposition takes into account consistent boundary computation between tasks,
and includes periodic conditions. In addition, the code computes neighbors
list, Voronoi density, Voronoi cell volume, density gradient for each particle,
and densities on a regular grid.
