Postimage

Postimage is a simple and effective screen capture tool that also lets you edit or annotate the screenshots or quickly upload them online and share them with whomever you want.
Postimage is pretty simple-to-use and intuitive.

It usually resides unobtrusively in the tray area and can be quickly summoned with just a press of a hotkey. The hotkeys are fully customizable. Moreover, it allows taking screenshots of the full screen, of a screen area or even of the active window. The screenshots can be quickly saved as JPG, PNG or BMP files, uploaded and shared online, or sent to the embedded image editor for further modifications and annotations (such as watermarking them).

As you can see, Postimage sports all the features and functions you might need. Even though it is comprehensive, anyone can use it with ease. I also think that the fact that it’s free, despite being feature-rich and powerful, is a big advantage that will convince a lot of users to choose this tool instead of the many other similar ones. To sum it all up, I like everything about this tool and I can’t find any flaws or downsides. I recommend it with all my heart.