game-editor.com

As GE is having Android. I believe it could use those tools to export as well to Blackberry Playbook.
There is a little video
https://bdsc.webapps.blackberry.com/android/tool/

They got so many problems with that solution (virus and other) that they decided to stop it completely.

http://www.gottabemobile.com/2012/04/09/rim-to-stop-app-sideloading-on-blackberry-playbook-to-curb-piracy/

Is there any other way? As I had also faced such problems. Lots of virus and junk folders.