A method, computer program product, and system for providing launchable application source code are presented. A determination is made regarding which target platforms a launchable application executable will be run on. Once the platforms have been determined, a cross platform executable is generated using the launchable application source code. Platform specific executables are also generated for each selected platform. The cross platform executable is then combined with the platform specific executable for the platform to provide the platform independent launchable application. The platform specific executable is launched by an Operating System as part of a system service, such as a screensaver, and calls the cross platform executable which is executed on a virtual machine running on the platform.