Figmotion - Animation tooling right in Figma
Textures.com - Textures.com is a website that offers digital pictures of all sorts of materials.
Jitter - A simple animation tool on the web
Poly Haven - Poly Haven (formerly known as Texture Haven) is an online website where you will find scanned textures without any cost and that are of high quality.
Principle - Principle makes it easy to create animated and interactive user interface designs.
Poliigon - A library of materials, and HDR's for artists including free textures that want photorealism.