Voronoi Tool is a Scriptographer implementation of the Voronoi library created by Raymond Hill.
Click and drag in your document to add points to the diagram.
Shift + Click + Drag to move a point
Alt + Click to remove a point
Select one or more paths and click on 'Add Selected Points' to add their points to the diagram.
Also included are a number of grid generators, which might be expanded in the future.
Undo is supported.