
Description: Balsamiq Wireframes is a rapid low-fidelity UI wireframing tool that allows designers to quickly mockup user interfaces for web and mobile apps. Its simple and intuitive drag-and-drop interface makes it easy to arrange pre-built UI components to map out the structure and layout of an app.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Caravel is an open source business intelligence web application. It provides rich interactive visualizations, SQL query and exploration, and dashboarding capabilities. Caravel is built on top of Python and React and connects to any SQL-speaking database or data warehouse.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API