Microsoft has released its Asynchronous JavaScript and XML tool, ASP.NET AJAX 1.0, to the Web.ASP.NET AJAX, formerly known by the code name “Atlas,” is Microsoft’s offering for developers to build next-generation, AJAX-style web applications through integration with the .Net Framework and the Microsoft platform. ASP.NET AJAX is a free framework, you can download it here.

ASP.NET AJAX 1.0 delivers a rich client-side AJAX library that provides cross platform, cross browser support for a core JavaScript type-system, JSON-based network serialization stack, JavaScript component/control model, as well as common client JavaScript helper classes. ASP.NET AJAX also delivers a rich server-side library that integrates AJAX functionality within ASP.NET, and enables developers to easily AJAX-enable existing ASP.NET 2.0 sites with minimal effort.

ASP.NET AJAX is available for free, and can be used with ASP.NET 2.0 and VS 2005. It is a fully supported Microsoft product, and is backed by a standard 10 year Microsoft support license (with Microsoft Product Support available via phone 24 hours a day x 7 days a week).

With ASP.NET AJAX, you can:

• Create next-generation interfaces with reusable AJAX components.
• Enhance existing Web pages using powerful AJAX controls with support for all modern browsers.
• Continue using Visual Studio 2005 to take your ASP.NET 2.0 sites to the next level.
• Access remote services and data directly from the browser without writing a ton of complicated script.
• Enjoy the benefits of a free framework with 24×7 technical support provided by Microsoft.

In addition to the fully-supported ASP.NET AJAX 1.0 release, you can use the more than 30 free ASP.NET AJAX enabled controls available within the ASP.NET AJAX Control Toolkit. The control toolkit is a shared-source collaborative project built together by a team containing both Microsoft and non-Microsoft developers. All source for the controls is provided completely for free.