Principle - Principle makes it easy to create animated and interactive user interface designs.
Animate in Principle - Prototyping course from Figma to Principle
Tumult Hype - Tumult Hype is a keyframe-based animation system for creating HTML5 web content.
LottieFiles for Figma - Insert Lottie animations as GIFs and SVG's into your designs
CIC enVision - enVision software makes large volumes of digital multimedia content easily and quickly accessible also provides WYSIWYG layout editor.
LottieFiles Embed - Embed Lottie animations on Notion, Medium, Ghost, and more