
Description: PlantUML is an open-source tool for creating UML diagrams from plain text. It supports all standard UML diagrams like use case diagrams, class diagrams, sequence diagrams, etc. PlantUML allows users to write simple textual descriptions which are then transformed into UML diagrams.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Gravizo is an open-source diagramming tool that allows users to create a variety of diagrams like flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, and more using a text-based domain-specific language. Users write Gravizo script in a text editor or document and Gravizo renders it as images.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API