Mousetrap is a simple library for handling keyboard shortcuts in Javascript. Mousetrap is a standalone library with no external dependencies. It weighs in at around 1.5kb minified and gzipped.

It has support for keypress, keydown, and keyup events on specific keys, keyboard combinations, or key sequences.

While good for simple effects, popular JavaScript libraries like jQuery lack the Oomph required to animate complex user interactions in the DOM.

JSTween was designed from the ground up for speed and precision, allowing it to handle more simultaneous animations while maintaining a silky smooth frame rate.

Major Features

• Performance – Built from the ground up to scream
• Precision – Animate complex interactions with ease
• Framerate – Frame smoothing means complex scenes appear more fluid
• jQuery – Hooks into jQuery for ease of use
• Easy to use – Get started quickly using it’s simple implementation

Mobello is a high performance JavaScript UI framework for building great HTML5 mobile apps. Mobello includes javascript framework(Mobello.js) and IDE(Mobello Studio).

You can build native-like HTML5 apps for smartphones and tablets. Mobello is scalable and robust framework suited for fast and rich user interface.

With MVC architecture and clean component model, you can keep your code sensible and organized.

The Annotator is an open-source JavaScript library and tool that can be added to any webpage to make it annotatable.

Annotations can have comments, tags, users and more. Morever, the Annotator is designed for easy extensibility so its a cinch to add a new feature or behaviour.

The Annotator JS also has a simple but powerful plugin architecture. While the core annotator code does the bare minimum, it is easily extended with plugins that perform such tasks as: serialization, authentication and authorization, prettification etc…

You’ll need to store your annotations data somewhere, but if you can’t then luckily there is an easy way to do this, using AnnotateIt, a hosted web service for storing annotations.

Balloons.IO is a web-based, realtime, open source multi-room chat server and client.

Balloons chat application is built by combining the latest technologies in web design and development such as CSS3, HTML5, Node.JS, and Redis.IO Socket.IO.

What counts is the experience of the user, and Balloons has a robust flexible backend with nice and functional designs. This realtime chat application uses easy-OAuth for authentication with Twitter.

SelectNav.js is a lightweight (1.5kb), library agnostic JavaScript for creating responsive drop down navigation menus. It lets you convert your website navigation into a select drop-down menu.

Used together with media queries it helps you to create a space saving, responsive navigation for small screen devices.

Features

• Independent – no external library or other dependecies
• Ligthweight – only 1.5KB minified and 0.8KB minified+gziped
• Customizable – to make it suit your needs
• Compatible – tested with IE 6+, Firefox 3.6+, Chrome 4+, Safari 3+, Mobile Safari iOS 3.2+, Android 2.3+ Browser, Opera Mobile, Opera Mini.

QuoJS is a micro, modular, Object-Oriented and concise JavaScript Library for that simplifies HTML document traversing, event handling, and Ajax interactions for rapid mobile web development.

It allows you to write powerful, flexible and cross-browser code with its elegant, well documented, and micro coherent API.

It is designed to change the way that you write JavaScript with the goal: a 8-12k library that handles most basic drudge work with a nice API so you can concentrate on getting stuff done.

Handsontable is a minimalistic (60 KB unminified) jQuery script to create Excel-like table editor in HTML & jQuery. This jQuery plugin creates a flexible and easy to customize excel-like table grid.

Major Features

• Autoexpanding – Type in any cell and see how the grid adds new rows and cols automatically
• Drag-down – Same as in Excel, you can drag it (drag-down) to repeat the values from the cell
• Context Menu – Support context menu

If you are looking for more complicated data grid / table solutions, consider using:

• Ajax Spreadsheet Widget: dhtmlxSpreadsheet
• Flexible Client Side Table Sorting: Tablesorter
• Turn HTML Tables Into Advanced Editable Components
• Flexigrid for jQuery – Lightweight and rich Web 2.0 data grid

Chronoline.js is a JavaScript library that helps you create a chronological timeline out of events on a horizontal timescale.

From a list of dates and events, it can generate a graphical representation of schedules, historical events, deadlines, and more.

This chronology timeline script jQuery qTip2 to provide nicer tooltips and requires Raphael.js to function.

Recommended timeline related resources:

• Creating Storytelling Timelines
• Making Simple Historical Timelines
• JavaScript Animation Library with a Timeline
• Timeline-Driven Javascript Animation Toolkit
• Open Source JavaScript Timeline Component
• Free Facebook Timeline WordPress Theme

WYSIHTML5 is an open source rich text editor based on HTML5 technology and the progressive-enhancement approach. It uses a sophisticated security concept and aims to generate fully valid HTML5 markup by preventing unmaintainable tag soups and inline styles.

Major Features

• It’s fast and lightweight (smaller than TinyMCE, Aloha, …)
• Auto-linking of urls as-you-type
• Generates valid and semantic HTML5 markup (even when the content is pasted from MS Word)
• Uses class names instead of inline styles
• Uses sandboxed iframes in order to prevent identity theft through XSS
• Speech-input for Chrome
• It’s library agnostic, no library required (jQuery, Prototype, etc…)