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.
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.