TouchDesigner by Derivative contains a BlackTrax CHOP, which is a node that receives RTTrPM data from BlackTrax. Using this node as an input projects can easily consume the tracking data to drive their visuals/audio/hardware in any way they want.
TouchDesigner receives the Trackable (without Timestamp), Trackable (with Timestamp), Centroid Position, Tracked Point Position, Centroid Acceleration and Velocity, Tracked Point Acceleration and Velocity, and Orientation (Euler) modules
TouchDesigner uses little endian and the stage coordinate system