Sony's next-gen application platform built on Objective C/GNUStep
Honestly I always considered Objective-C to be one of Apple's secret weapon. Both higher <i>and</i> lower level then Java. Objective-C stays closer to the spirit of Smalltalk yet presents no hoop jumping when you need the performance of C.<p>That, and Cocoa was not designed by morons - protocols and delegation, <i>not</i> inheritance, rightfully rule the day.