- VennDiagram.com
 - Includes a database of Venn diagrams and Create-A-Venn, an interactive form that creates a personalised diagram. - Venn Diagram Basic
- Contains examples of double cell and expanded Venn diagrams.
- Venn Diagrams
- Contains examples and diagrams.
- Survey of Venn Diagrams
- Includes definitions, a biography of John Venn, graphs, and variants of Venn diagrams.
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