yEd

yEd is a powerful application that can help in the making of complex diagrams, with an automatic layout feature that can arrange elements by itself for huge data sets.

It is a cross platform Java-enabled program that encases a very rich palette of elements which can be integrated seamlessly into a new diagram. With it, you can also edit existing graphs that can be imported from a variety of sources.

Relying on an intuitive and user-friendly interface, the program organizes its feature set into several menus, accompanied by a quick toolbar with access to the most common functions. Most of the GUI is reserved for the creation of the diagram, while the sidebars provide access to various views, including successors and properties of an element.

The palette of built-in objects is always present to the right of the diagram, delivering the elements inside suggestive categories. Shape nodes, modern nodes, edge types, UML items, flowcharts, entity relationships and objects related to computer network or people can be added with drag and drop to the current workspace.

Diagrams can be created from scratch, but importing data in various formats (such as GraphML, Excel spreadsheets, GML, GEDCOM and XML) is also possible. Concerning export options, the offer is even richer - formats such as PDF, DWF, SVG, HTML, EPS, BMP, JPG, GIF and PNG are on the table.

With the aid of the automatic layout feature, your efforts to interconnect the elements will be drastically reduced. This option makes use of a complex mathematical algorithm that will arrange objects automatically without significant intervention on the user side.

In conclusion, yEd is everything you need if you deal with diagrams on a daily basis. It can help in a variety of scenarios, for instance in decision making projects, as well as in development related activities where a logic scheme is needed.