Pure is an unobtrusive JavaScript template engine for HTML.
It aims to make HTML dynamic as templates can be created with only JavaScript, HTML & CSS.

Pure is fast & runs on the browser/client side. It currently supports JSON (XML to be supported soon).
This JavaScript template engine can be used as a jQuery plugin (soon Dojo, DOMAssistant, MooTools, Prototype).
Pure provides a detailed "getting started" information supported with helpful examples.
Requirements: jQuery
Compatibility: All Major Browsers
FLIR (Facelift Image Replacement) is an image replacement script that enables you to use any font in your websites.
It is similar to sIFR but uses JavaScript + PHP rather than Flash.

Fonts to be used are pre-uploaded and a PHP script creates the image using these fonts. Later on the image is inserted via JavaScript.
PHP GD library can not render some fonts properly. For this reason FancyFonts plugin (optional & requires ImageMagick) is also integrated to FLIR and it can handle almost any font.
Requirements: PHP 4+, GD Library
Compatibility: All Major Browsers
mooSlide is an easy to use & configure slider class for MooTools.
It is a functional solution to present any content, even as a Lightbox replacement.

Within 1 line of code, you can set the:
- slider div
- slide in speed
- fade out speed
- remove on click yes / no
- final opacity
- height of the slider container
- type of effect used
- toggler element
- slide from position
And, multiple sliders can be used in 1 page.
Requirements: MooTools 1.1+
Compatibility: All Major Browsers
firefly is a totally different chat system which can power your websites.
By adding a line of JavaScript, your visitors can chat with each other in an overlayed screen.

Users can:
- See other users mouse movements,
- Choose avatars,
- See the chat history,
- Howmany people are already in the page.
As a developer, all I can ask for more is an API that enables integrating any userbase to the system for adding auto avatars, names to the users etc. Considering this is a fresh chat service, in the future, why not?
You should definitely give firefly a try & will probably be impressed.
Requirements: No Requirements
This is a JavaScript time picker with a drag’n drop enabled clock interface.
Usage is very simple, hour and minute hands can be dragged & dropped to the desired value. Clicking to the AM-PM also enables you to switch between them.
This time picker is highly configurable including the "starting hour", sizes & images used.
It requires Mootools and the document to be a XHTML doctype to run. Download package includes all the necessary resources including the PSD files.
Requirements: Mootools 1.11+, XHTML doctype
Compatibility: All Major Browsers
haXe is an open source & multiplatform programming language.
A code written with haXe can be compiled to JavaScript, Flash (AS2 & AS3), PHP and NekoVM which is all the idea behind the project: "let the developer choose the best platform to do a given job".

haXe has installers for Windows, OSX & Linux and the platform is well-documented.
For writing haXe code, plugins for several popular editors can be found here.
Requirements: No Requirements
Compatibility: Windows, OSX & Linux
js-hotkeys is a jQuery plugin which enables you to create keyboard triggered events.
Update: The plugin is based on shortcut.js. You may want to use this for not being restricted with jQuery.
This is a very nice feature if you want to provide users more browsing flexibility. And also, it can be used in JavaScript testing environments like triggering a test function by clicking CTRL + t.

A simple usage of the plugin is:
$.hotkeys.add('Ctrl+a',function(){/*DO YOUR DUTY*/});
$.hotkeys.remove(’Ctrl+a’);
A demo of this jQuery keyboard control plugin can be found here.
Requirements: jQuery
Compatibility: All Major Browsers (some handicaps are mentioned at the product website)
woork presents a nice MooTools news ticker, which scrolls vertically, similar to the one in Newsvine.

Content is currently hard-coded inside the HTML within li elements. There is also an information provided for how to get the content dynamically from a database.
Speed & delay of the slide effect can be configured within the code.
Requirements: MooTools
Compatibility: All Major Browsers
Spacegallery is a very simple but nice image gallery built with jQuery.
It is a static gallery where images are hardcoded in the HTML and presented with a beautiful grow - fade out effect.

How to use?
After inserting the JS & CSS files into your webpages, create a div element with images inside like:
<div id="myGallery" class="spacegallery">
<img src="images/bw3.jpg" alt="BW" />
<img src="images/lights3.jpg" alt="Lights" />
</div>
And call the gallery:
$('#myGallery').spacegallery({loadingClass: 'loading'});
You can also configure the perspective, border & animation duration.
Requirements: jQuery
Compatibility: All Major Browsers
jqPuzzle is a jQuery plugin which enables you to create sliding puzzles from any image.
The created JavaScript puzzle can have the shuffle & solution options besides the moves made & seconds played.

jqPuzzle is highly configurable as the options in the interface can be enabled/disabled, number of rows & columns of the puzzle to be created can be defined & more.
How to use?
After inserting the jquery.jqpuzzle.js & jquery.jqpuzzle.css files to your webpage, simply give the class="jqPuzzle" to any image. That’s all.
Requirements: jQuery 1.2.1+
Compatibility: All Major Browsers