ShareX (making tutorials)
ShareX is an open-source program that lets you take screenshots, save them in your clipboard, hard disk or upload them to over 20 different remote locations. ShareXmod can capture screenshots with different shapes: rounded rectangle, ellipse, triangle, diamond, polygon and also free hand. It can also upload images, text files and all other different file types. It is able to capture screenshots with transparency and shadow. The program also supports drag n drop, clipboard upload and Windows Explorer integration.
You can download it here.