Top 20 NuGet AJAX Packages

A small library for mapping HTML5 data attributes to jQuery AJAX request objects.
JSON Dynamic Object (JDO) is a small and lightweight library that provides a simple paradigm of working with JSON objects in .Net. Everything is stored as a native type, and made easily accessible through member access notation and internally uses the JavaScriptSerializer Class.
Homeun Pager
Provides TypeScript declaration files for the Bing Maps v7.0 AJAX Control.
Legacy version of AjaxControlToolkit which is not published on its official NuGet package page http://nuget.org/packages/AjaxControlToolkit
This package includes the community version of WebSync Server 3.5.0.8 plus the code from the WebClient example to get started. I use John Moss' WebSync Server Starter Kit 1.0.0.3 and update to WebSync Server 3.5.0.8.
The Razor Client Templates library allows you to reuse your Partial Razor Views as client side (JavaScript) templates.
Windy.Json is super lightweight Json Dom library, which is powered by Dyanmic Object and Linq in C# 4.0.
TakeIo.Essentials is a RESTful framework for ASP.NET MVC 3. TakeIo.Essentials supports Sinatra-like (from Ruby) routes, implements OPTIONS and HEAD methods in a reasonable way, adds syntax-sugar methods for returning OpenSocial (JSON/XML) single items and collections, decouples routing from controll...
.NET-based implementation of the Universal Binary JSON Specification
Json Blog Data Store
A scaffolder has many similarities to the built-in "Controller ... using Entity Framework" scaffolder, but it provides pagination, reordering and inline editing of the content using Ajax.
A dynamic json library
Json serializer and deserializer for .net
Command tool for generating managing and running database migrations
PagedList makes it easier for .Net developers to write paging code. It allows you to take any IEnumerable(T) and by specifying the page size and desired page index, select only a subset of that list. PagedList also provides properties that are useful when building UI paging controls.
Light JSON PCL Library
A utility library for helping create SEO-indexable content for AJAX-based web apps. Implementation based on Google's AJAX crawling specs.
A small two-file JSON de/serializer in C# that also works on MonoDroid/MonoTouch
JSON Consumer