The ASP.NET AJAX Control Toolkit is a classic set of ASP.NET WebForms extensions that helps you build ASN.NET websites. Now maintained by devexpress.com

Ajax Controls and Extenders written in C# using Ajax 1.x and MS Visual Studio 2005.

It's purpose is to have the Ajax controls on Windows Forms It's developed in C#

Ajax Multi-ListBox is .NET C# written user control with a dual listbox that uses ajax to move items from left to right and vice versa.

Ajax.NET Professional (AjaxPro) is one of the first AJAX frameworks for Microsoft ASP.NET and is working with .NET 1.1 and 2.0.

An ASP.NET AJAX framework

This project gives you access to the code for upcoming releases that the ASP.NET team is working on, starting with the ASP.NET MVC Framework.

rich set of helpers used to build highly responsive ajax-enabled Web applications. These helpers include the Grid, AjaxDropdown, PopupForm, Lookup and more

Calipso is an object-oriented platform which enables developers to implement mixed server and JavaScript ASP.NET Web Forms controls.

A template-based ASP.Net CMS built with C#, SQL server, jQueryUI, and TinyMCE. Supports multi-tenant webroot and database and works well in medium trust.

Microsoft has created an excellent starter kit, the Club Starter Kit, for individual clubs to host a variety of content. As an extension of the initial project, with the spirit of open source, we add additional value to the Club Starter Kit.

This area is used for providing information and discussions about the CodePlex website.

jQuery Contorls for ASP.NET makes it easier for ASP.NET developer to using jQuery and jQuery ui in ASP.NET developing.It not only provides cool web controls for jQuery but also provides a ui lightweight framework to write jQuery plugin Server Controls super fast!

DNJ is a .Net framework aiming to bring the power of JQuery library to Asp.Net and VisualStudio by providing a set of jquery/jqueryUI/plugins webcontrols configurable from VS Designer and making ajax coding easier. The goal of DNJ is to become a true Web 2.0 .Net Framework.

Complete Management Software suit for Schools and colleges

Employee Info Starter Kit is an open source project that is highly influenced by the concept ‘Pareto Principle’ or 80-20 rule, where it is targeted to enable a web developer to gain 80% productivity with 20% of effort with respect to learning curve and production.

This is two example projects that demonstrate the use of the jquery plugin "jQuery Unified Export File".

Flajaxian FileUploader is .NET web control designed for asynchronous file upload of multiple files at the same time, without a page post back and with a progress bar indicating the current upload progress. This control does not require full trust environment. The control can be extended with the addition of server side and client side adapters. Flajaxian FileUploader uses Adobe Flash Player 8 or higher Flash player for the file upload.

Hybrid Clock for Microsoft Silverlight 2.0 contains the "best of both worlds": Analog and Digital controls in perfect harmony used for Date/Time visualization. It's written in XAML, C# and JavaScript and could enhance any Silverlight-enabled .NET Web application.

JavaScriptClientPages is a cross-browser, cross-platform tool, which makes dynamic client-side content generation as easy as it is on the server side with technologies like ASP.net, PHP, Ruby on Rails, etc.. Each JavaScritpt Client Page is a complete XHTML page with embedded JavaScript code, as well as custom output tags that make it possible to create clean XHTML templates with advanced presentation logic while eliminating the drudgery of writing custom DOM manipulation code or innerHTML construction. Pages are compiled to compressed DOM-generating code that can then be used to insert the generated content to an arbitrary element on an existing page.