An Ajax expert, demonstrates how these technologies work together -- from an overview to a detailed look -- to make extremely efficient Web development an easy reality. He also unveils the central concepts of Ajax, including the XMLHttpRequest object. More info

Ajax isn’t a technology. It’s really several technologies, each flourishing in its own right, coming together in powerful new ways. Learn more about AJAX and how it's changing how developers build web applications. More info

Internet Explorer on Windows, Safari on Mac OS-X, Mozilla on all platforms, Konqueror in KDE, IceBrowser on Java, and Opera on all platforms including Symbian provide a method for client side javascript to make HTTP requests. From the humble begins as an oddly named object with few admirers, it's blossomed to be the core technology in something called AJAX More info

Ahah is a new way to generate webpages. Actually, it is more of a subset of ajax, but intended to be simpler and faster. It is backed by David Hansson, the creator of Ruby on Rails. More info