Allows to work on the assignment of partial charges, chemical topology and bonded parameters in organic molecules. PrimaDORAC is intended to do automatically and reliably most of the tedious work involved in the construction of small molecule drugs (SMDs) topology and parameter files. This tool allows to recognize molecular topologies and delivers about them. This can help in the process of refining general purpose force fields for molecular dynamics simulations, e.g. by increasing their accuracy augmenting the number of atomic types.