glpoisson displays a piece of cloth (or some other piece of material) under stress. glvibration simulates a wave in the piece of cloth, which may help the user to relax a bit, while giving your processor an exercise in the process. Great for making waving flags and logos ! The source package contains lots of useful routines : 1. An infix parser in under 200 lines. 2. An object oriented library for vector and matrix operations. 3. An implementation of the finite element method using triangular elements. I am willing to work with someone to adapt the software to his needs.