
Description: Blisk is a free and open-source web browser designed for web developers. It allows testing websites across multiple devices and viewports from one browser window. Key features include device and viewport emulation, network throttling, CSS/JS code coverage, and web page screenshot capture.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Responsinator is a free online tool that helps designers and developers test the responsiveness of their websites. It allows you to preview a site across various screen sizes like desktops, tablets, and phones to see how the design adapts on different devices.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API