Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
GNU Octave - GNU Octave is a programming language for scientific computing.
Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.
Inference - Inference is a body measurement tool using a short questionnaire to otely capture over 50 body measurements without a measuring tape.