TextFit is a fast, dependency-free text sizing component that quickly fits single and multi-line text to the width and/or height of its container.
Fitty is a javascript library that scales up (or down) text so it fits perfectly to its parent container. Ideal for flexible and responsive websites.
Fitter Happier Text is a javascript library for performant and fully fluid heading inspired by FitText.
Fitter Happier Text replaces each node with an SVG text node and sets the viewBox
attribute based on its width and height.
Imagefit is a simple, lightweight jQuery plugin to make images fit anywhere and anyway.
TextTailor.js is a jQuery plugin for responsive text to fill the height of the parent element or ellipse it when it doesn't fit.
Fit.js has a very simple purpose and that is to help you fit things into other things.
Squishy is a jQuery plugin that automatically resizes text to exactly fit the container with no extra work on your part. This plugin only works for a single line; if you are looking for multiline text fitting you can see SlabText.
imgLiquid is a jQuery plugin to resize images to fit in a container.
Features:
Picbox is a lightweight (around 5KB) javascript image viewer based on the excellent Slimbox, and available using either the jQuery frameworks. It features automatic resizing and zooming of large images, allowing them to fit in the browser or be viewed at full size.
Also Picbox WordPress plugin is now available.