
Description: Concept.ly is an online collaborative whiteboard tool for brainstorming and organizing ideas visually. It allows teams to create virtual sticky notes, add images and shapes, draw diagrams, and move things around to structure concepts.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Principle is an open-source visual tool for building interactive UIs. It allows designers and developers to design, prototype, animate and develop user interfaces without writing code. Principle focuses on animations and interactions.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API