Snag It , released by TechSmith is a powerful desktop software that can record your computer screen in many different & effective ways.
Snag It can do a lot of complex operations. It can take a snapshot of anything on the computer screen. The pictures of the screens can then be labeled, edited, tagged & then filed in different categories.
Snag It makes collaboration with pictures very simple. Once you capture the picture, you can edit the snapshot & post to blogs, add to emails or even post it to the wiki.