A screen-capture software is a must-have tool for creating instructional tutorials. If you are a Mac user and cannot afford a commercial version of screen-capture software, I recommend InstantShot! for your consideration. InstantShot! is a part of the DigitalWater project and is free for download. It offers basic screenshot functionality for capturing the whole screen, a portion of it or a window and also the option to make timed screenshots or to make delayed captures over time.