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MOLSYM for DOS:
A Program on Molecular Symmetry and Group Theory 
Luis Vázquez Vidal
Molecular symmetry has become a traditional theme in structural chemistry due to its practical relevance to many other fields, such as quantum chemistry, force field analysis, and spectroscopy, among others. Although the concepts related to molecular symmetry are not particularly complex, their rigorous application often requires the use of a mathematical formalism known as "point group theory". 

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Program MOLSYM provides teachers, students, and researchers with tools for dealing with diverse aspects of this theory and applying them to specific examples and problems. It runs on a personal computer and has a user-friendly interface. Table data as well as graphics and help screens are available.
The main topics covered are 
  • symmetry elements
  • symmetry operations
  • group properties
  • operation matrices
  • molecular structure
  • atom permutations and equivalences
  • deduction of symmetry
  • construction of symmetrical structures 
A copy of the program and related information is available free from the download page.

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Citation:
Vazquez-Vidal, Luis. MOLSYM: A Program on Molecular Symmetry and Group Theory
Journal of Chemical Education 1996 73(4) 321-2 
This is not the actual output of MolSym, just little Java applets courtesy of Sun Microsystems.
You can drag the mouse pointer over the pictures and see the effects.

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