
Description: Poseidon for UML is an open-source UML modeling tool for creating diagrams like use case, class, sequence, state machine, and activity diagrams. It has a simple and intuitive graphical interface for quick diagram drawing.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Modelio is an open source modeling tool for software architects and developers. It supports various modeling standards like UML, BPMN, and requirements modeling. Modelio helps create visual models and diagrams to design, document, and communicate complex software systems.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API