One Click Test - Tool for quickly testing your design layout in one click.
Lottie by Airbnb - Easily add high-quality animation to any native app
XPRS - Free website builder - making web design like Lego™. No code
Marionette Studio - Marionette Studio is an online animation software for beginners and professionals. Animate 2D characters and environments in minutes with no prior skills.
Dimensions Toolkit - Chrome Extension for designers to test responsive websites.
Spirit - The animation tool for the web.