What is the name of these "offset" nibs and pens? I was looking into pen nib preventative maintenance and found a couple of pictures that I didn't understand. The first we see the nib on top is not the same as the rest as it has a crooked body.



Image from linktoink.wordpress.com

Then you have this pen which look like you get the same effect as the nib but the pen is specialized and normal nibs are used. This image was part of a "pointed pen" image. Searching for that did not help. So I know it is called something else. 



Image from Reddit.com

What are these called and what are they used for? Is this something that is easy to handle for some?
It is called an Oblique Calligraphy Pen. It is used because it makes it much easier to hold the nib pointing in angles that are otherwise very hard to achieve if you're right handed (oblique angles):