PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.

MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming

Forms On Fire - Forms On Fire provides a complete, customizable mobile forms and workflow system that is reliable and secure, works offline or online.

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.

Camunda - The Universal Process Orchestrator

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