Off-topic but does anyone know what that atom skin used in the screenshot (https://user-images.githubusercontent.com/378023/29859731-741403be-8d9e-11e7-99c5-6b9

Off-topic but does anyone know what that atom skin used in the screenshot (https://user-images.githubusercontent.com/378023/29859731-741403be-8d9e-11e7-99c5-6b914e3fff9c.png https://user-images.githubusercontent.com/378023/29859731-74...) is called?