To introduce it a bit: AIDA/Web is a web server and framework for
complex web applications with integrated Ajax support, rich collection
of web components to build web pages programatically, MVC-like
separation of presentation from domain, nice looking and bookmarkable
url links, with integrated session and security management and many more.
AIDA/Web is known by its simplicity but still allows building most
demanding web applications of many sorts. It has everything you need for
a real web app, together with Ajax.
It is also a mature one, running web apps in production since 1996. It
is used in many intranet business apps from Gas billing system for all
gas in Slovenia to logistics management system called e-logis and
recently a CMS like system for Quality and Business process management.
I hope therefore that Squeakers will find Aida useful too as a good
alternative for building your web applications!