16. En.wikibooks.org Wiki Programming:ajax Page
Programming Ajax From Wikibooks, the open-content textbooks collection
http://en.wikibooks.org/wiki/Programming:AJAX

17. Jaxcent.com
Jaxcent provides a Java framework and API for doing AJAX programming.
http://jaxcent.com

18. AJAX Libraries API - Google Code
The AJAX Libraries API is a content distribution network and loading architecture for the most popular open source JavaScript libraries. By using the Google AJAX API Loader's google.load() method, your application has high speed, globaly available access to a growing list of the most popular JavaScript open source libraries.
http://code.google.com/apis/ajaxlibs