stickUp is a simple jQuery plugin that allows you to designate an element or navigation menu which will stick to the top of the page once scrolled past, and will return to place when scrolled past the other way.
Sticky Sidebar is a jQuery plugin for sticky/fixed contents (headers, sidebars, footer, etc...)
ScrollToFixed is a jQuery plugin that used to fix elements on the page (top, bottom, anywhere); however, it still allows the element to continue to move left or right with the horizontal scroll.
Sticky-Kit is a jQuery plugin for making smart sticky elements Sticky-Kit provides an easy way to attach elements to the page when the user scrolls such that the element is always visible.
A fixed header that will animate its size on scroll. The inner elements will also adjust their size with a transition.
An animated header that will change its size on scroll. Once a certain amount of the page gets scrolled, the header will decrease its size and the inner elements will adjust their font-size/line height. There are example media queries for dealing with different screen sizes.
Smint is a simple jQuery plugin that helps with the navigation on one page style websites.
It has 2 main elements, a sticky navigation bar that stays at the top of the page while you scroll down and menu buttons that automatically scroll the page to the section you clicked on.
Hachiko is a jQuery sticky plugin that allows a relatively positioned element to be stickied onto the screen when the element is scrolled outside of the viewport.
Instead of changing the position of the element on window scroll, this plugin creates a clone of the original element and set the clone to be fixed positioned so the original layout is always preserved.
Sticky is a jQuery plugin that gives you the ability to make any element on your page always stay visible.
jQuery Pin is a jQuery plugin for creating sticky elements. You can pin something to the side of a text and subtle sticky element to quietly hang around as you scroll down.
Also you can easily disable this for smaller screen-sizes where there's no room for that kind of shenanigans.
fixto is a jQuery plugin for sticky positioning. Fix containers to the viewport relative to an ancestor.
scrollNav is a light jQuery plugin that grabs your page's existing content, divides it up into logical sections and builds a customizable scrolling sidebar navigation.
jQuery Stick 'em plugin makes items sticky as you scroll, to a point. Easy to implement and flawless to the point of perfection, this is indeed a very useful plugin.