YTXAnimations is an open source library from baidao providing a large number of fun pre-made animation effects inspired by Animate.css.
In all there are over 70 animations including general attention seeker animations, entrance/exit animations, flip animations and more.
The library extends UIView and are easy to implement with customizable durations.
This animation from the readme shows the available animations:
You can find YTXAnimations on Github here.
A nice library adding an extensive assortment of pre-made animations.