yEd is a very powerful graph editor that can be used to quickly and effectively generate drawings and to apply automatic layouts to a range of different diagrams and networks. yEd makes full use of the yFiles library. This is a Java class library enabling the viewing, editing, optimizing, drawing, and animating of a wide range of diagrams, networks, and other graph-like structures. WWW: https://www.yworks.com/products/yed