Spine - Spine is 2D animation software designed specifically for software and game development.
Makers.so - A website builder inside Figma.
Synfig Studio - Just another WordPress site
Anima App - Design, get feedback, convert to code, publish, iterate.
AnimeEffects - AnimeEffects is a 2D keyframe animation tool based on deformation of polygon meshes.
BuilderX - Design to code, designers and developers on one platform.