About:

This tool was developed by Peter Husemann, Bielefeld University
  phuseman at cebitec dot uni-bielefeld.de
The source code is available under GPL.

If r2cat was useful for you, please cite it in your work:
Husemann, P. & Stoye, J.
r2cat: synteny plots and comparative assembly
Bioinformatics, 2010, Vol. 26(4), pp. 570-571
Open Access: http://bioinformatics.oxfordjournals.org/cgi/content/full/26/4/570

Acknowledgements:

Thanks to