ScreenFlow is a popular screen-recording and editing tool for creating screencasts, such as presentations, tutorials, and product demos, on your Mac. This app can handle every aspect of pulling together a screencast, from high-quality screen capture (including the ability to grab iSight and DV camera data, and mic and computer audio) to editing and exporting, with built-in YouTube publishing.
Thanks to ScreenFlow's fairly intuitive interface (now with even more time-saving shortcuts and contextual menus), even novice users can assemble a basic screencast. Experienced users, on the other hand, will appreciate the app's more sophisticated touches, such as the ability to freeze frames, adjust clip and transition speed (with 2D and 3D transitions), and apply saturation, brightness, and contrast to clips. Recent updates have also added the useful ability to create standalone Flash files, with the video, html, and player all embedded in the file.
All in all, ScreenFlow is one of the best apps of its kind for the Mac--and as a bonus, it even comes with a Flip4Mac WMV Studio serial number.