
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: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: TopCoder UML is an open source unified modeling language tool for creating UML diagrams and documentation. It is lightweight, cross-platform, and has features for class, sequence, use case, and other UML diagrams.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API