Highlight

Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server. It works with pretty much any markup, doesn't depend on any framework and has automatic language detection.   Highlight.js - Features: 92 languages and 49 styles (live demo) automatic language detection multi-language code highlighting available for node.js works with any markup compatible with any js framework  

HideSeek is simple, yet customizable jQuery plugin for live search, supports highlighting, custom message, navigation, initialization via data attribute and custom events.   HideSeek - Features: Search in text or title/alt attribute Highlight Navigation Custom events Custom messages  

visualNav is a jQuery plugin that modifies a navigation menu to highlight / change when the menu's target smooth scrolls into view. visualNav - Features: Smooth scrolling page navigation. Easing can easily be defined for both horizontal and vertical scrolling. Auto-updating menu which highlights both the currently viewed content & other content in view. User can cancel auto-scroll by pressing any key, clicking on the page or scrolling the mousewheel. Can be set up to work with any men

Highlight Search Terms is a jQuery plugin which highlights search terms in referrer URL from Google, Yahoo, Bing and custom site.  

Litelighter is a super light weight yet powerful syntax highlighting plugin for jQuery and Zepto. It comes with light and dark themes and js, html, css languages by default. And it is super easy to extend!