Progress Nav is an animated progress bar that highlights sections of a page that are currently in view.
microlight.js is a micro-library which improves readability of code snippets by highlighting, for any programming language, yet without attaching additional language packages or styles
Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind.
jQuery.mark is a jQuery plugin to highlight text with diacritics, synonyms, custom elements, custom class names, separate word search (multiple terms), filter selectors, word boundary and iframe support. Compatible with DataTable.
Emoticons.js is a jQuery plugin to insert emojis, font smileys, embed videos (youtube/vimeo), media files,pdf and highlight code syntax.
Wholly is a jQuery plugin used to select the entire table row and column in response to mouseenter and mouseleave events. Wholly supports table layouts that utilize colspan and rowspan.
The library is lightweight around 3kb and works in most modern browsers except IE and touch devices.
highlightRegex is a jQuery Plugin that lets you highlight document text with a regular expression.
Highlight.js highlights syntax in code examples on blogs, forums and, in fact, on any web page. It's very easy to use because it works automatically: finds blocks of code, detects a language, highlights it.
jQuery Litelighter is a lightweight yet powerful syntax highlighting plugin. It comes with light and dark themes and js, html, css languages by default.