SYMMETREE is a freely available command-line program written in ANSI C++ compiled for Macintosh OSX, Windows, Linux, and Unix operating systems. The program implements several tests of differential diversification rate that exploit information on the topological distribution of species diversity throughout entire trees (i.e., the so-called 'balance' or 'symmetry' of phylogenetic tree topologies) to address two general questions: (1) Has a given tree experienced significant variation in diversification rates among its branches? and, (2) If so, along which branches have significant shifts in diversification rate occurred? These explicitly model-based, whole-tree methods are robust to uncertainly in estimates of branch length/duration and can accommodate incompletely resolved trees and other forms of phylogenetic uncertainty.

The license of this software is Freeware, you can free download and free use this calculator software.