Reply to Custom MIDI controller

Have just made my own controller using 2x gamepads and some encoders. I essentially want to use this to control FX in traktor with 2 rows of 4 encoders.

I have it all soldered up and assembled but I can't seem to find a decent HID to MIDI converter that is simple to use. Can anyone help or post up a tutorial to a HID to MIDI converter that is simple to use and available for free / very cheap price?

Thanks

Ps I am running a windows 7 based OS