Responsive Viewer - View multiple screen dimensions in one view

Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.

Responsinator - Designed to test responsive websites on different devices.

Screenity - The most powerful screen recorder & annotation tool for Chrome 🎥 - GitHub - alyssaxuu/screenity: The most powerful screen recorder & annotation tool for Chrome 🎥

Responsive Website Test - Test any website on desktop, mobile, and tablet

EasyRes - EasyRes is a fast screen resolution switcher for Mac OS X with live animated previews.