Math Jax
Beautiful math in all browsers
Balance Text
A jQuery plugin for implementing balancing of wrapping text in a web page
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.
Kerning.js
Take control of your web typography.
Text Tailor.js
jQuery plugin, tailor made text to fill the height of the parent element or ellipse it if it doesn't fit
Author Marks
JavaScript to toggle highlighting HTML5 'mark' tags, to emphasise con tent.
Baseline.js
A simple jQuery plugin for restoring vertical baselines thrown off by odd image sizes
Lettering.js
A lightweight, easy to use Javascript <span> injector for radical Web Typography
Fit Text.js
A jQuery plugin for inflating web type
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
Webfontloader
WebFont Loader gives you added control when using linked fonts via @font-face.
Flow Type.js
Web typography at its finest: font-size and line-height based on element width.
Big Text
jQuery plugin, calculates the font-size and word-spacing needed to match a line of text to a specific width.
Lining.js
An easy to use javascript plugin offers you complete DOWN-TO-THE-LINE control for radical web typography.