Cogitant is dedicated to reasoning with conceptual graph knowledge bases. It is developed by David Genest.
The Cogitant library is a set of C++ classes enabling to easily build applications based on the Conceptual Graph model. Cogitant provides classes for each object of the CG model (support, graph, rule, constraint...) and the main operations of the model (projection, application of rules...). Cogitant has been tested with all major operating systems (GNU/Linux, Microsoft Windows, Sun Solaris, Mac OS...). It is distributed under the GNU General Public Licence (GPL 2).