Even though this hotly anticipated smartphone from Sony Ericsson is not yet available to the public, all your amateur developers out there can already start creating cool applications for it. The best part is that it won’t even cost you a penny to do so.

Sony has just released the software development kit (SDK) for the upcoming Sony Ericsson xPeria X1, a smartphone that is basically powered by Windows Mobile 6.1, but gets dressed up with a unique “panels” user interface. The SDK takes full advantage of this unique experience.

The 100% free SDK for the xPeria X1 can be downloaded directly from Sony. There’s no App Store (yet) for the xPeria, so you may have to market your creation yourself.