Cappuccino
From Docunext Technology Wiki
Cappuccino is a very interesting looking web application framework. It is built using Objective-J, which is a programming language written in Javascript to match the syntax of Objective-C.
Apparently, Cappuccino is similar to Sproutcore.
The syntax is totally foreign to me - I'd prefer something much more like Ruby or jQuery.
License
Cappuccino is licensed under the LGPL.