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

Description: Diagram Designer is a free, open-source, cross-platform diagramming software for creating flowcharts, UML diagrams, BPMN diagrams, network diagrams, maps, floor plans, and more. It has an intuitive drag-and-drop interface with a large collection of vector shapes and templates.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API