SVG Animation (SMIL) @Jenkov
SVG Scripting (JavaScript animations) @Jenkov
A Guide to SVG Animations (SMIL) | CSS-Tricks
How SVG Shape Morphing Works | CSS-Tricks
SMIL is dead! Long live SMIL! A Guide to Alternatives to SMIL Features | CSS-Tricks
The Simple Intro to SVG Animation
KUTE.js | Javascript Animation Engine
Fun Web Animation Effects with KUTE.js — SitePoint
anime.js
juliangarnier/anime: JavaScript Animation Engine
Anime.js – using an advanced animation library in Tizen | Tizen Developers
not free:
MorphSVG plugin | GSAP from GreenSock | JavaScript HTML5 Animation