Blast
Blast text apart to make it manipulable.
Typefont
The first open-source library that detects the font of a text in a image.
Cufon
Fast text replacement with canvas and VML - no Flash or images required.
Jquery.typer.js
A simple jQuery plugin for a slick typing effect.
Math Jax
Beautiful math in all browsers
Flow Type.js
Web typography at its finest: font-size and line-height based on element width.
Text Tailor.js
jQuery plugin, tailor made text to fill the height of the parent element or ellipse it if it doesn't fit
Baseline.js
A simple jQuery plugin for restoring vertical baselines thrown off by odd image sizes
Author Marks
JavaScript to toggle highlighting HTML5 'mark' tags, to emphasise con tent.
Webfontloader
WebFont Loader gives you added control when using linked fonts via @font-face.
Lettering.js
A lightweight, easy to use Javascript <span> injector for radical Web Typography
Textillate
A simple plugin for CSS3 text animations
jQuery Webfonts
jQuery based Webfonts library
Trmix
apply CSS based on your browser's text rendering engine
Big Text
jQuery plugin, calculates the font-size and word-spacing needed to match a line of text to a specific width.
Kerning.js
Take control of your web typography.
Fit Text.js
A jQuery plugin for inflating web type