Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
GNU Octave - GNU Octave is a programming language for scientific computing.
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.