SlipHover is a awesome jQuery plugin to apply direction aware hover animation for the caption of an image.
scrollAdvance is jQuery plugin that adds some useful functions as scrollBottom(), scrollRight or scrollCenter() for the scroll position in more scrollLeft() and scrollTop() to HTML page with an animation.
shine.js is a fantastic ¬†jQuery plugin for pretty shadows.
jquery.simpleLoader is a jQuery plugin for do animated gif loaders with opacity overflow over html elements.
An amazing tutorial to add an animation to your one page scroll websites.