Great Stella software (version 5.4) is a program for creating and manipulating polyhedra in 3D space. It allows for the creation of various types of polyhedra, such as regular, stellated, and compounds. The software also includes tools for exploring and analyzing the properties of these polyhedra, such as calculating surface area and volume, and creating nets for construction. Additionally, Great Stella includes features for creating animations and interactive models of polyhedra.