...Simple Remoting is an alternative SOA library which uses JSON instead of XML as its messaging format. Converting popular java object types like POJO, Spring and EJB to services can be done within minutes without any code change on existing classes.
J2J provides an intuitive way to convert Java to JSON and JSON to Java. Annotate any Java class then use JsonWriter to emit JSON from java or JsonReader to convert JSON to java objects. (source code and tutorial included) Version 2.0 in development.
Servlet framework for creating standalone restful CRUD services
...It is downloadable as a windows installer package for quick no-hassle setup.
It runs as a servlet in an app-server. By default it sets itself up to run inside its own standalone (jetty) server.
Code contributions most welcome!
DynAjax is a Javascript / ASP.Net / C# Framework easing dynamic calls to business / service C# methods directly from JavaScript code (like DWR framework does in Java World). The object serialization is based on JSON, permitting complex objects exchange.
JAST (Javascript Toolkit) is an Open Source cross-platform javascript framework that aid users to perform the most hard operations with few simple lines of code.
It's modularity allow the download only for the code required to the page.