mocha V4 and MochaImport+
mocha Pro V4
Imagineer Systems just released mocha Pro 4. It adds support for stereo 3D workflows, python scripting and some other new features.
If you upgrade to V4, make sure to also get the (free) update of MochaImport+ 4.45 which fixes some issues with tracking data from mocha V4.
Also don't confuse MochaImport+ with mocha Plus which is just a new name for mocha AE (a "light version" of mocha Pro tailored to AE users with some more features than the mocha version that is bundled with AE CC).