Preview Transition,Pinterest Swift,Youtube Transition,Twicket Segmented Control,XLActionController,Feed UI,ExpandingCollection,DGElasticPullToRefresh,Persei,IGListKit,Presentation,Paper Switch,Neon.

These are trending presentation libraries in iOS. Most of these have 500+ stars on github, and few have more than 2 K stars.

Feel free to contact me via sudeep at agicent dot com.