Excellent screen capture apps aren't hard to come by, but excellent free ones are. With sophisticated features at no cost, it's hard to reach higher than Gadwin PrintScreen. An attractive, easily navigated interface opens up a customization wonderland for users to decide default settings for shortcut key associations, capture preferences, and output.
For our purposes, the clicking and dragging regions is the clear choice. Misjudge your region's dimensions and Gadwin PrintScreen lets you readjust them without having to start over, something many commercial competitors don't do. Setting the app to automatically open each screen capture in your favorite viewer or editor makes up for the program's lack of built-in image editor, still achieving a seamless screen capture experience from start to finish that grabs and delivers shots just where you want them.