GeXA is a simple library with three targets:
XMLHttpRequest
by
AJAX
applications.GeXA has been designed with a main target into mind: it is just the base component of more complex applications to be built on top of it. Because of this, a really free license has been chosen (BSD) and is strongly documented and incapsulated in an object oriented way.
Refer to the Sourceforge page to download the library. The README.txt and included documentation (or you can refer to the same documentation, online) offers all you need to start programming with GeXA.