Rive offers powerful real-time vector design and animation for an app and game designers alike. The primary goal of Rive is to allow designers to work directly with assets that run in their final product, eliminating the need to redo that work in code.
Rive is developed by 2Dimentions and its launch was just recently announced. It is free tool for design and animations. It does sound like a great tool for creating design and animations for games, web, and apps.
Rive allows designers to create sophisticated interactions, animated icons, onboarding screens, game characters, and more. These are real design assets that run in real time in your final product.
They don't need to be recreated in code, so designers are free to iterate and make modifications at any time.