equalize

The jQuery plugin for equalizing the height or width of your elements

Iframe Resizer

Responsively keep same and cross domain iFrames sized to their content with support for window/content resizing, multiple and nested iFrames. (Works with IE8+)

CSS Animate Auto

A jQuery plugin that uses CSS transitions to animate an element’s height or width to or from auto.

Selector-Query

A jQuery plugin that adds selector classes to elements depending on its width. Think of media queries but for element widths instead of browser widths.

IE8 expand select width

Expand automatically width to be able to read long options in IE8

simpleEqualize

Small 306 bytes jQuery Plugin for equalize the Width or Height of elements