TweenKit

Any type can be animated by conforming to Tweenable, as demonstrated with examples animating strings like 'bat' to 'cat', enabling custom object tweening beyond standard UI properties.

Actions can be manually scrubbed using ActionScrubber, ideal for interactive tutorials or progress-based UIs, shown with slider callbacks to control animation progress.

Animations are built from small, combinable Actions that can be grouped, sequenced, repeated, or reversed, enabling complex sequences like staggered arc animations for activity indicators without boilerplate.

Includes built-in easing curves like exponential and elastic, plus arc and bezier path animations with rotation support, as shown in rocket and circular motion examples.