Extrusion Editor is a visual plug-in for ParallelGraphics' VrmlPad, offers you an effective method for creating and editing extrusion models.
Extrusion Editor Main Features:
Visual support for every step in the creation of extrusions; all manipulations with the extrusion parameters are immediately displayed in the 3D window
Ability to create the cross-sections and spines based on spline curves
Advanced interactive texture mapping
Ability to assemble created extrusions in complex models
Expandable library of extrusions
Full VRML97-compliance