Div slides in after scrolling down
+https://stackoverflow.com/questions/10517826/div-slides-in-after-scrolling-down

On scroll get div to slide down
+https://codepen.io/jasonhulbert/pen/ZbNoZG

+http://jsfiddle.net/MkJwm/
+http://jsfiddle.net/B7pJL/1/

+https://www.sitepoint.com/scroll-based-animations-jquery-css3/#scroll-animation-examples

+https://www.jqueryscript.net/demo/jQuery-Plugin-For-Element-Fade-Slide-Effects-As-You-Scroll-FadeThis/
+https://johnpolacek.github.io/scrolldeck.js/

+http://www.bestjquery.com/demo/jquery-animate-scroll-effects/

+http://scrollmagic.io/