Ran across this and found the screen capture tool quite useful especially with the options.
PickPick
Features
* Captures
- Full Screen (Support for Dual Monitors)
- Active Window
- Window Control (Scroll a page automatically)
- Region, Fixed Region
- FreeHand
- Repeat Last Capture
* Image Editor
- It's very similar to Microsoft Paint, but you can do more.
- It provides an effect like selection opacity, blur, sharpen, brightness, contrast, hue, saturation, flip, rotate and etc.
* Color Picker
* Color Palette
* Pixel Ruler
* Screen Protractor
* Crosshair
* Screen Whiteboard
http://picpick.wiziple.net