Haxe is a nice multiplatform language which in its third release (May 2013), enables a complete DCI implementation. If you don't know what DCI is, go to fulloo.info for documentation, details, overview and more.
DCI stands for Data, Context, Interaction. One of the key aspects of DCI is to separate what a system is (form, class properties) from what it does (function, methods). Form and function has very different rates of change so they should be separated, not as it currently is, put in classes together.
A Context rounds up Data objects that take on the part as Roles, then an Interaction takes place as a flow of messages through the Roles. The Roles define a network of communicating objects and the Role methods force the objects to collaborate according to the distributed interaction algorithm.
(fulloo.info is your friend if this sounds confusing)
Install via haxelib:
haxelib install haxedci
Then put -lib haxedci into your hxml.
Clone the haxedci-example repository, then open the FlashDevelop project file or just execute run.bat (or run if you're on Linux). Also checkout the README file in that repository, it has an introduction to DCI.
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