GNU Octave - GNU Octave is a programming language for scientific computing.

Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.

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.

Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)

Maxima - Maxima is a fairly complete computer algebra system written in Lisp with an emphasis on symbolic computation.

ARIS Express - ARIS Express is based on the proven ARIS methodology and industry standards.