jQuery Plugins
Slickhover jQuery Plugin
slickhover.js is a lightweight useful jQuery plugin that produces a slick and smooth hover effect that fades out images and shows a custom icon when a user hovers over an image. All you have to do is call it on an image and slickhover does its thang!
View Demo View on GitHub
Flexisel – Responsive Carousel jQuery Plugin
Flexisel is a responsive image carousel jQuery plugin that adapts to screen size to create a great user experience showcasing content on all devices. It will change the number of items shown depending on the viewport width. All you have to do is call flexisel on your unordered list containing images.
View Demo View on GitHub
Wikiblurb.js
Wikiblurb.js is a jQuery plugin for querying the API for Wikipedia and other wikis built with the MediaWiki platform. Simply give the page name and get back any data that you want. You can also specify whatever custom selectors you want to pull data from and filter results however you like.
View Demo View on GitHub
More plugins of varying usefulness and completion are available on GitHub