The new tracker in Nuke 7.0, which was announced a few weeks ago, is simply AMAZING! Check out what it can do with this dedicated video:
My favorite feature must be the Traffic Lights feature and the "assisted keyframing".
Nuke is a high-end, node-based professional compositing software originally developed by Digital Domain and now distributed and developed by the Foundry in UK. Nuke has become the industry standard for compositing. It's highlighted features include the ability to work in 3D space with 3D meshes and geometry, it has built in Planar, Point and 3D Trackers, it can be programmed via Python, and the workflow is completely open!