Json.NET is a popular high-performance JSON framework for .NET

JSON is a light-weight, language independent, data interchange format. See http://www.JSON.org/ This package implements JSON encoders/decoders in JavaScript.

JavaScript client for ASP.NET SignalR.

A JavaScript MVVM library to help you create rich, dynamic user interfaces with clean maintainable code

JavaScripts functional programming helper library.

A lightweight javascript date library for parsing, manipulating, and formatting dates.

Backbone supplies structure to JavaScript-heavy applications by providing models key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing application over a RESTful JSON interface.

Sammy.js is a tiny JavaScript framework developed to ease the pain and provide a basic structure for developing JavaScript applications. Sammy tries to achieve this by providing a small core framework and an ever-growing list of plugins for specific functionality. The core includes a simple API for defining applications which are made up primarily ... More information

.NET's fastest JSON, JSV and CSV Text Serializers. Fast, Light, Resilient. Benchmarks at: http://servicestack.net/benchmarks/ Includes the String and Stream functionality for all the ServiceStack projects including: - T.Dump() generic extension method for easy dbugging and introspection of types - WebRequest, Li... More information

This library can minify and/or bundle any Javascript and/or Cascading Style Sheets. This is a direct .NET port of the original Yahoo! UI Library: YUI Compressor.

ASP.NET Optimization introduces a way to bundle and optimize css/js files.

Linq to Objects for JavaScript.

Ext.NET is an advanced ASP.NET (WebForms + MVC) component framework integrating the cross-browser Sencha Ext JS JavaScript Library. Includes 100+ high performance controls for Data Grids, Trees, Menus, Forms, Advanced Layouts and AJAX communication.

Handlebars.js is an extension to the Mustache templating language created by Chris Wanstrath. Handlebars.js and Mustache are both logicless templating languages that keep the view and the code separated like we all know they should be. Checkout the official Handlebars docs site at http://www.handlebarsjs.com.

A jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.

The Knockout.js External Template Engine extends Knockout.js to allow you to load templates asynchronously from a remote resource. It currently supports both native and jquery templates. Special thanks to Ryan Niemeyer for the assistance in getting jquery templates working in this version of the plugin.

Additional serialization provider for EventStore based on the Newtonsoft JSON.NET library.

Durandal is a cross-device, cross-platform client framework written in JavaScript and designed to make Single Page Applications (SPAs) easy to create and maintain. We've used it to build apps for PC, Mac, Linux, iOS and Android...and now it's your turn... Features -Clean MV* Architecture -JS & HTML Modularity -Simple App Lifecycle -Eventing, Modal... More information

yepnope is an asynchronous conditional resource loader that's super-fast, and allows you to load only the scripts that your users need.

DOM-less simple JavaScript testing framework.