CRNT wiki website: http://www.reaction-networks.net
Pete Donnell, Anca Marginean, Murad Banaji and I started a webserver for CRNT computations. It is easy to use, open-source, and comprises an extensible suite of modular tests. If you would like to contribute your own code, please contact Pete or me.
CoNtRol website: http://www.reaction-networks.net/control