Find the program to make examples of Arduino

Hello:

I see a lot on the Internet that make simple, desirable examples, drawing diagrams and sumulador at once. What are the most used?

I want to do graphic examples to show to other com these images.

Do not know if this below is the same program.

If multiple, they can put the link and comment which is the most used or recommended.

Greeting.

They are both fritzing diagrams. The link to the software is right there in your post.