One plugin to calculate the 3d convex hull from a set of points.
The plugin outputs the vertices, and all the edge indices as well, so you can easily create a mesh from it.
Many thanks to John E. Lloyd who authorized me to use and publish his code (ported from java to c#).
http://www.cs.ubc.ca/~lloyd/index.html
Help file in the zip, and source code in svn repository.
Enjoy