EDraw Soft Diagrammer 2.5User Rating :(Review : 3) OS: WindowsEDraw is a new UML diagram and software diagram drawing tool for software engineers and designers. Easy to draw uml model diagram. data flow model diagram. SSADM Diagram. Nassi-Schneiderman diagrams. Booch OOD diagrams. ROOM Diagram. Yourdon and Coad diagrams and Shlaer-Mellor OOA diagrams. program structure diagrams.