The "Roto-Mask" plug-in for Final Cut Pro X
SliceX is an FCPX plug-in that lets you create instant Shape Masks to cut out layers or isolate effects directly in Final Cut Pro X without having to go into Motion or create the masks with an external program. Create animated garbage mattes, blur shapes and more directly within your Final Cut timeline.
Slice X is now powered by mocha's Academy Award winning planar tracking engine to easily track roto masks for accurate masking with less manual keyframing.
From CoreMelt & Imagineer Systems