There are some other 3D convex hull implementations available in netland, but I didn't find any that satisfied all the above criteria, so I created my own. The principal class is QuickHull3D, which is contained within the package quickhull3d. It is actually a reimplementaion of an earlier piece of work, ConvexHull3D, which was based on an insertion algorithm and had a complexity of O(n^2).
Mark Newbold has used this package to create a very picturesque applet that creates and displays Waterman polyhedra
Quickhull3d downloading and documentation: