molecular modeling toolkit

 The Molecular Modeling Toolkit (MMTK) is a library for molecular
 simulation applications. It provides the most common methods in
 molecular simulations (molecular dynamics, energy minimization,
 normal mode analysis) and several force fields used for biomolecules
 (Amber 94, Amber 99, several elastic network models). MMTK also
 serves as a code basis that can be easily extended and modified to
 deal with non-standard situations in molecular simulations.