OmniGraffle is a diagramming software and digital illustration application for desktop Mac or iOS iPad users, created by The Omni Group. It allows users to convey ideas, organize thoughts visually, and communicate these thoughts and ideas to the world.
OmniGraffle is for creating precise, beautiful graphics. Like website wireframes, an electrical system design, a family tree, or mapping out software classes. For artists, designers, casual data-mappers, and everyone in-between.