Fully Communication Oriented Information Modeling (FCO-IM ) - http://www.casetalk.com/php/index.php?FCO-IM Conceptual modeling based on natural language, successor to NIAM fact type oriented modeling method. Has information on the method, links, list of CASE tools.
Linear Programming Language - http://www.virtual-optima.com/en/index.html Information on LPL, a mathematical modeling language, related product, projects and links.
Modelica - http://www.modelica.org/ Information on this object-oriented modeling language used for industrial applications, papers, tools, mailing list, and links.