flyLabel.js is a flexible floating form labels to make your boring placeholders super fly. With flyLabel.js, it's easy to trigger custom behaviors on form labels.
In-Field Labels is a simple jQuery plugin that turns properly formatted HTML forms into forms with in-field label support. Labels fade when the field is focussed and disappear when text entry begins. Clearing a field brings back the label.
A jQuery plugin that enables HTML5 placeholder behavior for browsers that aren’t trying hard enough yet.
jQuery Super Labels is a form field overlay plugin that hides labels when an input gains focus. It’ll work automatically with most text fields. If the label needs to be displayed in a different location, suitable options can be provided.
Super Labels has advanced options for controlling animation easing and duration.
A jQuery plugin to help implement the over label technique. When the user puts focus on the input, the label will be hidden. When the input is blurred and has no value, the label will be shown again. Just need to write the CSS based on your DOM structure to position the label over the element correctly.