Since the mid 1980s, an increasing number of project management software packages (PMSP) have appeared in the market to support project management organizations. Currently there are more than 500 software tools available. They vary widely both in their prices and capabilities. Despite the wide spread of PMSP, project-based organizations are left unguided as to how they should select the most appropriate software tool for their intended business use. The aim of this paper was to develop an evaluation/scoring module suitable for comparing different project management software packages to help select the most appropriate package. The evaluation model is based on the ISO/IEC evaluation criterion that takes into consideration all the necessary features and characteristics required in project management software. The evaluation model will provide software users and project organizations with a useful tool to compare various packages available in the market and select the best that suits their business needs.