First Radical Piano
Second Reason for iphone
THIRD Rack extension. And what this is, is a way for developers to build Reason devices. It is more than a plugin. As props have said for years, plugins don't fit at all with Reason. For example, all the routing is lost IE: CV. But this SDK developers will be forced to conform to the Reason way and give it all the routing features. Third parties that have already been announced include Korg, Sugar Bytes, Peff, Softube, GForce, SonicCharge. So I am FREAKING OUT.
Here are some screen shots
AND Reason will have a built in device store. Very cool!
and here is the first video
http://www.musicradar.com/news/tech/video-propellerhead-reason-rack-extension-explained-535501