With OmniGraffle, it's as easy as dragging and dropping to create flow charts, org charts, network diagrams, family trees, project processes, office layouts - anything you can think of that can be represented by symbols and lines.

OmniGraffle knows what makes a diagram different from a drawing, so it knows how to help you make superior documents quickly: it keeps lines connected to shapes even when they're moved, it provides palettes full of objects for you to drag and drop, and it can magically organize diagrams with just one click.

This is the best diagramming software on Planet Earth. It boots Visio in the pants.