For modelleing and simulations we use both commercial software, freeware and simulation code written by ourselves. For our own coding we mostly use matlab, fortran and visual basic but also python, C, C++, pascal, labview, etc. Our program MonteLab is available from here.
We have experience of for instance the following commercial programs:
Program using Finite Element Method for solving partial differential equations and Computational fluid dynamics
Amsterdam Modeling Suite
Program for symbolic calculations
We have experience of for instance the following freeware:
Code for electronic-structure calculations and materials modeling at the nanoscale, based on density-functional theory, plane waves, and pseudopotentials.
Molecular Dynamics simulation program
CPMD = Car-Parinello Molecular Dynamics
BOSS = Biochemical and Organic Simulation System
Simulation program for organic liquids and solutions