Sequence Evolutionary Rate Software?

[Victor Defilippis]

Dear Anyone:

I am interested in finding out if any software exists that compares/ 
analyzes DNA sequence data in terms of relative (or even absolute) 
substitution rate between coding regions, taxa, codon position, etc.  
If anyone knows of such a program please write to the e-mail address 
below.  Thanks in advance.

Victor DeFilippis
Wayne State University
vicdef at biology.biosci.wayne.edu