Tween.js

The library is minimal, focusing only on tweening numeric properties, which keeps it small and efficient without unnecessary bloat, as emphasized in the README's philosophy.

It doesn't include its own animation loop, allowing seamless integration into any existing requestAnimationFrame or game engine loop, demonstrated in the example code.

Incorporates Robert Penner's equations for smooth, natural motion curves, which are reusable outside of tweens, as highlighted in the features.

Methods like .to() and .easing() can be chained for clear, readable animation definitions, making it easy to build complex sequences, as shown in the examples.