Tool to generate proportional Venn diagrams

Here, you can find several tools of that.
http://biostar.stackexchange.com/questions/7736/tool-to-generate-proportional-venn-diagrams

VennDiagram: a package for the generation of highly-customizable Venn and Euler diagrams in R

http://www.biomedcentral.com/1471-2105/12/35