GCSpeciesSorter:

GCSpeciesSorter is a binary classification package for distinguishing between two or more species based on the GC contents of their DNA or RNA sequences. It includes source code in Python and is released under the GNU General Public License (GPL). Beyond unpacking, there is no special installation step necessary. Python, LIBSVM, and/or C4.5, and optionally, BLAST are needed to run the scripts. A README file in the package provides more details about running the scripts. The package includes all the input files (including test sequence files and BLAST database file), mentioned in the following paper.

You can read the paper Distinguishing Species Using GC Contents in Mixed DNA or RNA Sequences for more detailed information.

Download GCSpeciesSorter-1.0.tgz or GCSpeciesSorter-1.0.zip