
Description: Gaphor is an open-source modeling tool for UML diagrams and SysML. It allows users to create diagrams like use case diagrams, class diagrams, state machines, activity diagrams and more. Gaphor aims to be easy to use with an intuitive user interface.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Diagram.codes is a free online diagramming tool that allows users to easily create flowcharts, UML diagrams, UI mockups, network diagrams, and more. It has an intuitive drag-and-drop interface with various shapes and connectors.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API