Codename Rainbows allows you to effortlessly apply gradients, shadows and highlights to text.
The gradient in this plugin is comprised of a series of one-pixel-high slices of text. These slices are arranged vertically. Every slice is a slightly different shade, and when the slices are positioned via CSS the result is a smooth gradient created entirely without images.
Demo: http://labs.dragoninteractive.com/rainbows_demo.php
Download Links
http://labs.dragoninteractive.com/rainbows_manual.php