The Persevere project is an open source set of tools for persistence and distributed computing using intuitive standards-based JSON interfaces of HTTP REST, JSON-RPC, JSONPath, and HTTP Channels. The core of the Persevere project is the Persevere Server. The Persevere server includes a Persevere JavaScript client, but the standards-based interface is intended to be used with any framework or client.

The XEO (eXtensible Enterprise Objects) Framework is an agile development framework designed to create enterprise web applications. XEO is built around Object Oriented concepts, Model Driven Development (MDD), Model View Controller (MVC) and Model Driven Architecture (MDA) and it's powered by Java.

Æjaks combines the server-side Ajax windowing system Echo2 with the powerful simplicity of the Tcl langauge. The result is a rich development environment in which to develop Ajax-based web applications, often with much less code to write. Æjaks runs on top of a Java Servlet engine, and can make use of any existing Java library.

Aero is a PHP5 framework with a highly modular design, intended for programmers who prefer to control every aspect of the application they build. Unlike many other frameworks Aero does not make any decisions for you, there are very few conventions or rules you should follow.

Agavi is a powerful, scalable PHP5 application framework that follows the MVC paradigm. It enables developers to write clean, maintainable and extensible code. Agavi puts choice and freedom over limiting conventions, and focuses on sustained quality rather than short-sighted decisions.

AgileUnit is a small framework developed to increase the feedback loop while developing applications. Get feedbacks from your app while your customer is using it. Figure out what your customer really want early, which functions are most used and which not. Merge synergy of requirement, development, testing and maintenance to one piece.

AIDA/Web is a Smalltalk web application framework for building complex web applications with integrated Ajax support, rich collection of web components to build web pages programatically, MVC-like separation of presentation from domain, REST-like nice looking and bookmarkable url links, with integrated session and security management, a Swazoo web server and many more.

AjaxAC is an open-source framework written in PHP, used to develop/create/generate AJAX applications.

AjaxAnywhere is designed to turn any set of existing JSP or JSF components into AJAX-aware components without complex JavaScript coding. In contrast to other solutions, AjaxAnywhere is not component-oriented. You will not find here yet another AutoComplete component.

AjaxCFC is a ColdFusion framework meant to speed up ajax application development and deployment by providing developers seamless integration between JavaScript and ColdFusion, and providing built-in functions, such as security and debugging, to quickly adapt to any type of environment and helping to overcome cross-browser compatibility problems.