The Void IDentification and Examination toolkit (VIDE) identifies voids using a modified version of the parameter-free void finder ZOBOV (ascl:1304.005); a Voronoi tessellation of the tracer particles is used to estimate the density field followed by a watershed algorithm to group Voronoi cells into zones and subsequently voids. Output is a summary of void properties in plain ASCII; a Python API is provided for analysis tasks, including loading and manipulating void catalogs and particle members, filtering, plotting, computing clustering statistics, stacking, comparing catalogs, and fitting density profiles.
https://ui.adsabs.harvard.edu/abs/2015A%26C.....9....1S and https://ui.adsabs.harvard.edu/abs/2008MNRAS.386.2101N ; see additional citation information here: https://bitbucket.org/cosmicvoids/vide_public