Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Lax.js - Create beautiful & smooth animations when you scroll
Platforma - Wireframe library of layouts and UI elements
WOW.js - Animate elements on-scroll to catch attention. Such Magic.
Craftwork - A collection of User Interface resources made by Craftwork
ScrollMagic - The jQuery plugin for magical scroll interactions.