SPEasingCurves

For those times you need something more than UIViewAnimationCurveEase[In|Out|InOut], now you can use SPEasingCurves to create more realistic animations.

It's based on the easing curves from easings.net and it works with CoreAnimation and Pop animations.

If you want to use it with Pop, you'll probably need at least 1.0.7 version, which includes a fix I submitted for timing functions that exceed 1.0 that made the animation to stop prematurely.