In previous posts like The Ultimate Collection of AJAX Form Validation Plugins (Controls) or AJAX Search: Save Time, Save Money, we have introduced some APIs and plugins, in fact there are many tools, APIs, frameworks and applications can make our developing life pretty fast and simple.
They provide a powerful solution for rapidly developing web-based applications, easy-to-use WYSIWYG builder that enables the drag & drop assembly of scalable, web-applications using Ajax widgets, web services and databases.
SACK is a simple set of code to allow you to put AJAX into your webpages with none of the fuss or overhead of other packages.It makes using AJAX simpler, and easy to implement.SACK is released under a Modified X11 licence.
Clean is an open source engine for AJAX, that provides a high level interface to work with the AJAX technology. It was designed in conformation with the separation of concerns principle, keeping focus on AJAX issues so Clean AJAX can be plugged in any page or DHTML framework.