jQuery TextFill is a jQuery plugin resizes text to make it fit into a container. The font size gets as big as possible.
Readable is a jQuery plugin to help you create optimally sized paragraphs for maximum readability.
It injects styling between the 45th and 75th character of every
<p> tag on your page
fontFlex is a lightweight jQuery plugin for dynamically changing font sizes according to screen / browser width. Intended to be used with responsive or adaptive CSS layouts.
BigText is a jQuery plugin, calculates the font-size and word-spacing needed to match a line of text to a specific width.
At its simplest, the BigText jQuery plugin takes a single element and sizes the text inside of its child's to fit the width of the parent element. Gives the text that lovely vertical alignment.
Font sizer is a highly configurable, unobtrusive jQuery plugin that allows users to adjust the font size of specific area(s) of text on your website. It's lightweight, easy to configure and adds a nice bit of functionality to your blog, forum or news site.
jqIsoText is a plugin for changing size of letters in text. It starts from one font size and increment or decrement to other font size. On that way we’re getting something similar to isometric projection. That can be done for whole block of text or for every word in some text.