
Description: WhiteStarUML is an open-source UML modeling tool for Windows, Linux and Mac. It allows users to create UML diagrams like class, sequence, use case, state machine and activity diagrams. It has basic UML 2.0 compliance and is lightweight and easy to use.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Umbrello is an open source Unified Modeling Language (UML) diagramming tool and code generator. It supports UML diagrams like class diagrams, use case diagrams, sequence diagrams, state machine diagrams and more. Umbrello helps developers design and document software applications and systems.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API