OmniGraffle is described as 'can help you make eye-popping graphic documents—quickly—by providing powerful styling tools, keeping lines connected to shapes even when they’re moved, and magically organizing diagrams with just one click' and is a well-known app in the Office & Productivity category. There are more than 50 alternatives to OmniGraffle for a variety of platforms, including Windows, Mac, Online / Web-based, Linux and iPad. The best alternative is diagrams.net, which is both free and Open Source. Other great apps like OmniGraffle are Pencil Project (Free, Open Source), yEd Graph Editor (Free), LibreOffice - Draw (Free, Open Source) and Dia (Free, Open Source).
MyDraw is an easy to use, yet powerful diagramming software that lets you create a large number of diagrams like flowcharts, organizational charts, mind maps, network diagrams, floor plans, family trees, business model diagrams, and many more.
Clickcharts flowchart software allows for easy drawing of diagrams and flowcharts to provide a way of organising and displaying data. Lay out your ideas, organisation and processes or create UML, Venn or mind map diagrams with this flow diagram maker.
PathVisio is a free open-source pathway analysis and drawing software that allows drawing, editing and analysing biological pathways. It provides a basic set of features for pathway drawing, analysis and visualization. Additional features as plugins.
An online diagramming tool with built-in productivity features to create diagrams faster. Draw flowcharts, mind maps, org charts, network diagrams, Venn diagrams and 50+ other diagrams types. Readymade templates to get started fast.