Screenpresso, a Windows application that is free to download and use, allows you capture various areas on your screen in different formats. You can also edit them easily.
There are several modes you can use to capture images: fullscreen, window, custom region, last captured region and capture with scroll. This is ideal for documents and websites.
After you have taken the image, the editor that is included with the program allows you to edit the file. You can add text to your capture, as well as symbols and arrows. The image can be resized and cropped.
Screenpresso, as you can see is an effective and comprehensive tool.