Snagit is a commercial application for capturing pictures displayed on the device screen, recording video and audio played on the computer.
It is created by TechSmith Corporation for Windows platforms, but it is supported on Mac OS as well.
The program allows to highlight objects on the screenshots, resize the picture, add comments, special effects.
The captured images can be saved as files, sent via e-mail, printed, transferred to other applications.
The application suggests its users a free 15-days trial period.