
Description: Prott is a web and mobile app prototyping tool that allows designers and developers to quickly create interactive prototypes and share them with stakeholders for feedback. It has a simple drag-and-drop interface to build screens and connect them with transitions and gestures to simulate app behavior.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Penpot is an open source design and prototyping tool for UI and UX designers. It allows designers to create wireframes, mockups, and prototypes with support for canvas grids, symbols, shared libraries, and sketch imports. Penpot has vector editing capabilities, component libraries, and developer handoff features.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API