Anyone can contribute to this project. This is the idea: If you designed or want to design an interesting data visualization in ggplot2 and are eager to share it to everyone, write a markdown file according to this format. At best, you should try to get in touch with me before you put in all the effort. My goal is to provide people with a fully comprehensive documentary on how to design specific data visualizations. That's why I might ask you to review your document until it fulfills the criteria of comprehensibility. Of course I will credit you as the author of your data visualization.
Feel free to get in touch with me.