VELOCIraptor-STF, formerly STructure Finder (ascl:1306.009), is a 6-Dimensional Friends-of-Friends (6D-FoF) phase space halo finder and constructs halo catalogs. The code uses using MPI and OpenMP APIs and can be compiled as a library for on-the-fly halo finding within an N-body/hydrodynamnical code. There is an associated halo merger tree code TreeFrog (ascl:1911.021).
https://ui.adsabs.harvard.edu/abs/2019PASA...36...21E ; if using VELOCIraptor for galaxy finding, please also cite https://ui.adsabs.harvard.edu/abs/2019MNRAS.482.2039C