Wolfram MathCore Products Registration
All information concerning Wolfram System Modeler (previously MathModelica) and MathCode can be found at https://www.wolfram.com.
The MathCore newsletter, MathLetter, has been replaced by the Wolfram Community Insider.
Wolfram System Modeler
Wolfram System Modeler is the most complete physical modeling and simulation tool.
(The third-party software notice can be found here.)