We are starting to get rather a large number of requests for Venn diagrams with various characteristics. The current software is sufficient for Stirling's Ph.D., but now we are thinking that it may be worthwhile commercializing a more user-friendly and flexible version.
We have no idea what people would be willing to pay for (a) individual diagrams, or (b) software that would draw area-proportional diagrams. If you could provide us with some feedback on those questions we would really appreciate it. Feedback can be sent via email at the contact page.
We are also happy to help with diagram requests, but do ask that, if your budget allows, you make a token contribution to our research. This would help us justify further grant applications to support our research.
Donations can be made to the following address or to our PayPal account (you do not need a PayPal account):
Venn Diagram Software c/o Dr. Frank Ruskey Department of Computer Science University of Victoria PO Box 3055, STN CSC Victoria, BC Canada V8W 3P6