Blake Robinson used the FL Studio SDK to create his BRSO Articulate plugin.
What is BRSO Articulate?!
BRSO Articulate is a plugin Blake Robinson has been using privately for the past 5 or 6 years for FL Studio. It's a replacement for the MIDI Out plugin that simplifies the process of using 'Keyswitches' in your compositions. It allows you to utilise any of the 16 Voice Colours in the piano roll to activate a particular keyswitch, mod wheel value or UACC code in your sample libraries. Think of it as an FL Studio version of Cubase's VST Note Expression mapping. You have may seen this plugin in various walkthroughs, live streams and screenshots Blake Robinson posted around social networks. Blake Robinson spent some time giving it a decent UI over the past couple of weeks and is now making it publicly available as a free beta.