Fractron 9000 currently uses Nvidia’s CUDA library to quickly compute fractal flames. The user interface is written in C#, and communicates with CUDA via my own custom interoperability library. Fractron uses OpenGL to display the fractals, which will hopefully make it possible to port Fractron 9000 to non-Windows platforms in the future.
Fractron 9000 renders fractals using an algorithm very closely based on the algorithm used by another program called Apophysis. As a result, future versions of Fractron 9000 may be able to load and save fractal flames generated with Apophysis.