Lightshot

A great and easy program for creating screenshots

Download Link

To use, press the PrintScreen key, next to F12.

After selecting the screenshot area, you can add:

You can also save to a file, and even copy (ctrl+c) directly from the program, without saving, and then paste (ctrl+v) to Whatsapp on the computer (web.whatsapp.com) or any other software which supports pasting images.

We use it a lot for questions and answers between mentors and students, and also in the development process between team members.