PicPick
It is an all-in-one program that provides a full-featured screen capture tool, an intuitive image editor, a color picker, a color palette, a pixel-ruler, a protractor, a crosshair and even a whiteboard. PicPick includes everything regarding graphic design, so it will save not only your disk space but also working time and money.
This software is distributed as a freeware for personal use only. In this case, you are granted the right to use this program free of charge. Otherwise, you need to pay for a license for commercial use.