WinSnap

WinSnap is the perfect tool to capture transparent backgrounds, parts of the desktop, and an entire window or screen. One unique feature unlikely to be found in similar software is the possibility of capturing non-rectangular forms. Enhance your creativity and add after-effects to the captured image.

Easily browse through the library that contains eye-candy shadows, outlines, watermarks, reflections, and color effects of your choice. Annotation, round corners selection, multiple object capture, and many other functions further ease your tasks.

And it would be best if you also took notice of the multiple settings one can choose for an image: from angle and distance to size and opacity.