RightJS is a compact (30k) feature rich JavaScript framework, along similar lines to JQuery or Prototype which:
- Compact by itself and allows others to write compact code
- Has standard predictable and really comfy API
- Supports multi-paradigm development and extensive OOP abilities
- Modular, with small and fast core
- Works fast and stable

According to the author’s own benchmarks, RightJS is faster than all the other major frameworks, and in some cases faster even than pure DOM manipulation, checkout a comparison against other frameworks.
RightJS has a subproject named RightJS UI that contains standard useful user interfaces and widgets.
Cached Commons is a collection of user-contributed javascript libraries that have been cached, optimized, and hosted on Github’s fast CDN.

The main goal is to aggregate the best-of Javascript and CSS libraries for rapid prototyping. It won’t have every javascript library because there’s 1000’s of jQuery Tooltip plugins out there, but only say 3 of them are really good.
You can easily download the libraries to your local project if you’d like, or feel free to directly link to the ones here.
Touch Gallery is an open source full-screen photo gallery for touch devices that brings the look and feel of native photo viewing applications to your mobile browser.

This open source photo gallery is a jQuery plugin and was primarily written and optimized for Mobile Safari running on the iPad or iPhone 4 but it also works fine in Dektop Safari, Firefox 4, as well as in Opera and Chrome.
Touch Gallery depends on two other plugins: transform and activity-indicator and both are packaged in one Javascript file you download with touch gallery.
HTML5 validates forms without any additional Javascript but currently, WebKit browsers (Safari & Chrome) can handle webForms 2.0 forms without any Javascript and plugin.
This HTML5 form validation plugin adds form validations to HTML5 forms for non-Webkit browsers. It gets all the information from the HTML source and runs automatically when detects Internet Explorer, Opera or Mozilla Firefox. However, you can force it to work with all browsers to get additional customization.

You just need to create your form according the HTML5 syntax and the script will execute itself. It does not require extra classes.
Who cares to install applications when we have got a browsers. Now a remote computer can be accessed from any OS platform through any HTML5 compliant browser (Firefox, Google Chrome, Safari, etc).
ThinVNC is pure web based HTML5 Remote Desktop solution. ThinVNC takes advantage of the latest web technologies like AJAX, JSON and HTML5 canvas to deliver a high-performance Remote Desktop access over the web, using HTTP and SSL protocols.

ThinVNC also provides a Presentation Mode, which allows to securely invite people and show them the whole desktop or selected applications, always taking advantage of a pure-web access with no download or installation of any kind on the client side.
Polymaps is a free JavaScript mapping library for making dynamic, interactive maps in modern web browsers. It creates image and vector tiled maps using SVG.

Polymaps provides speedy display of multi-zoom datasets over maps, and supports a variety of visual presentations for tiled vector data, in addition to the usual cartography from OpenStreetMap, CloudMade, Bing, and other providers of image-based web maps.
Web applications like Gmail, Facebook, Campfire and Pandora are becoming more and more like desktop applications every day. Running each of these web apps in an individual tab in your browser can be a real pain.

Fluid lets you create a Site Specific Browser (SSB) out of any website or web application, effectively turning your favorite web apps into desktop apps.
Features
- Open Plug-in Architecture
- Built-in Userscripting
- Single-Window Browsing Mode
- BrowsaBrowsa Plug-in for Sidebars
- Twitter Timeline Plug-in
- Thumbnail Plug-in for CoverFlow
Hyde is a static website generator powered by Python & Django. Hyde supports all the Django template tags & filters and even has a few of its own. The built-in web server and auto-generator provide instant refresh and unlimited flexibility.

Features
- No database, no slowness, no digg-effect
- Dynamic content can be displayed using javascript
- Templates are dynamic, output is static
- Efficient versioning using source control systems
There are two layouts currently available: default and simple. The default site layout contains templates for basic site structure, navigation, breadcrumbs, listing, posts and Atom feed and a very basic stylesheet.
The default template supports Typogrify, which is a collection of Django template filters that help prettify your web typography by preventing ugly quotes and widows.
Primary is a small yet effective open source CSS framework for designers and developers in order to make using CSS as easy as possible. It comes with a collection of 22 ready to use CSS layouts to start your project today.

The Dropdown Check List jQuery widget transforms a regular select html element into a dropdown checkbox list.

It uses the existing structure of the html select elements on which it is applied to dynamically build a container with checkboxes and labels then hides the original select element. The plugin does not change in any way the existing select element, only syncronize the checked values from the new container to the original select.