
Description: blockdiag is an open-source Python library and command-line tool that generates block-style diagram images from simple text files. It supports multiple diagram types like block diagrams, sequence diagrams, activity diagrams, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: yEd is a free and open-source diagramming software for Windows, macOS, and Linux. It allows users to quickly and easily create diagrams like flowcharts, network diagrams, UML diagrams, BPMN diagrams, org charts, and more. yEd has automatic layout algorithms to tidy up diagram layouts.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API