Skitch is a Mac application that has raised many expectations. Mainly because it's the creators that Comic Life. The Plasq.com site included in MacOS X Tiger.
The interface of Skitch is very curved. It is the familiar environment of all applications in OS X, but has in common with these quality of finish.
With Skitch we can capture a screenshot directly from the iSight or open an existing image.
The editing possibilities are basic, but sufficient for these programs: Boxes, circles, lines, text, arrows and color fill. When creating text, it automatically adds an outer edge to make it more remarkable. It's Nice touch.
When you save an image edited, press the button that says 'Drag me' and drag it where we want to save the image.
No doubt that Skitch is an excellent tool when making tutorials such as the use of text and arrows is tremendously useful.