Auto Fix Anything jQuery plugin will let you automatically fix position of any container on your website with one JS call. The plugin will detect when to fix/unfix the position automatically.
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.
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.
fixto is a jQuery plugin for sticky positioning. Fix containers to the viewport relative to an ancestor.
jQuery lockfixed allows for DOM elements to be positioned anywhere on the page, and lock within the user's viewport when scrolling. Common use case is a menu under a header, which on scrolling stays fixed within the viewport.
stickyMojo is a contained sticky sidebar plugin for jQuery. It is lightweight, fast, flexible and compatible with Firefox, Chrome, Safari, and IE8+. It will degrade gracefully in older versions of IE.