What are some good screencapturing applications? Possible Duplicates:
  Creating a professional looking screencast?
  Recommendations for video editing + screen capturing software
  Camtasia, Screenflow, or &ldquo;Other?&rdquo;  




What are some good screencapturing applications for OS X? I am specifically looking for an application that records in HD video. I have used QT Player X, but I'm wondering if there are some alternatives out there.
I'm partial to Screenflow. It works well, it's easy to use, and it's good for both capturing the screen, capturing audio (or even video via FaceTime camera) of you narrating the screencast, and can handle mixing the different sources of input. At $99, it isn't cheap, but it does work well. I use it for demo videos for my students.