JS Bin is a webapp specifically designed to help JavaScript and CSS folk test snippets of code, within some context, and debug the code collaboratively. JS Bin allows you to edit and test JavaScript and HTML (reloading the URL also maintains the state of your code - new tabs doesn't). Once you're happy you can save, and send the URL to a peer for review or help. They can then make further changes saving anew if required.
jabsorb is a simple and lightweight Ajax/Web 2.0 framework that allows you to call methods in a Java web application from JavaScript code running in a web browser as if they were local objects residing directly in the browser.
jabsorb handles all the details of marshalling and unmarshalling objects back and forth between the client and server so that you can focus on writing your application features.
jabsorb makes use of the JSON-RPC protocol for it's transport mechanism. JSON-RPC is a standard protocol and jabsorb can interoperate with other standard JSON-RPC clients and servers that may be written in other languages.
Starting with jabsorb 1.2, additional ORB functionality has been added, and it extends the basic JSON-RPC protocol to allow for passing data structures that contain Circular References.