With this tool you can calculate the intersection(s) of list of elements. It will generate a textual output indicating which elements are in each intersection or are unique to a certain list. If the number of lists is lower than 6 it will also produce a graphical output in the form of a venn diagram. You have the choice between symmetric (default) or non symmetric venn diagrams. Currently you are able to calculate the intersections of at maximum 30 lists. The graphical output is produced in SVG and PNG format.
Handy tool, draws diagram, which can be exported to png and svg, also generate list of objects in all combination of categories which can be exported to text file, but not very handy. Samples can be uploaded or its' contents pasted. It doesn't draw diagram for six samples.