If you're looking for an easy to use yet extremely powerful Ajax chat solution, then ASP.NET Ajax Chat may be just what you're looking for. The software is simple to install, fast and customizable. It uses AJAX to smoothly refresh (no flicker).
Anaa is a complete Ajax framework written in JavaScript, with GET and POST methods support. Allows to load plain text or XML document and to send data or commands to the server. Manual and demos included.
A framework for developing rich, AJAX enabled applications using the WinForms object model, development patterns and tools. Developing complex web applications is a simple as developing their desktop counterparts. Free community edition available.
KFileUploadPlusProgressBar includes Ajax based progress bar. It displays various status information about the current upload, just like pure HTML progress bar but instead of popup window it uses an inline progress bar with the AJAX technology.
Ajaxium replaces ASP.NET postbacks by AJAX, transforming existing ASP.NET applications to Web 2.0 without Javascript or server-side coding. Ajaxium-powered sites remain just as accessible to search engines and old browsers as classic ASP.NET sites.
The JoyiStar WebShop is the Ajax web development tools released by JoyiStar corporation. It provides an efficient OOP developing method to construct stable and convenient Rich Web applications based AJAX component.