jQuery plugin / jQuery library

jQuery form validation
http://plugins.jquery.com/validate/

http://jqueryvalidation.org/

Scroll Sly
http://darsa.in/sly/

Portfolio animation
 Quicksand
http://razorjack.net/quicksand/
http://www.templatemonster.com/blog/filterable-animated-portfolio-layout-tutorial/

jQuery Animation scroll / viewpoint animation
animate-scroll
Demo

http://www.jqueryscript.net/tags.php?/scrolling%20effect/

iFrame Resizer use