
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: System Designer is a visual modeling and design tool for creating software system architectures. It allows users to model systems using various UML diagrams like use case, class, sequence, and activity diagrams.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API