Corporate CRM System
There are a lot of examples that you can access here:
Ajax In Action
Basic Screen
Ajax Version 1
Ajax Version 2
Ajax Libraries
Dojo: Simple
Dojo: Eval JS from the server
Prototype: Simple
Prototype: Eval JS from the server
Prototype: Ajax.Updater
Ajax UI Libraries
Prototype: Server Side Validation
Prototype: Server Side Validation with Progress Indicator
Prototype: The Yellow Fade Technique
Scriptaculous: AutoComplete Fields
Ajax PHP
Sajax
XOAD
XOAD: OO