STLFinder - The 3d models search engine.
WOW.js - Animate elements on-scroll to catch attention. Such Magic.
Thingiverse - Thingiverse.com is the place to share digital designs for fabricating real, physical objects.
Lax.js - Create beautiful & smooth animations when you scroll
Cults 3D - Cults is a marketplace that connects designers and people who want to 3D print some objects.
ScrollMagic - The jQuery plugin for magical scroll interactions.