Rep Plus & WebGrid Plus
freely available resources

Rep Plus

Rep Plus is a suite of conceptual modelling tools developed by Dr Mildred L G Shaw and Dr Brian R Gaines. It runs under Microsoft Windows or Apple OS X and is freely available for personal, academic, professional and commercial use.

WebGrid Plus

WebGrid Plus is an interactive web service for conceptual modelling that is included as a component of Rep Plus, and is a freely available service from a number of university web sites.


The techniques and software have been developed over five decades at a number of academic institutions, the University of Cambridge, Essex University, Middlesex University, York University, University of Toronto, University of Calgary and University of Victoria, with support from a wide range of funding sources.

Privacy Statement

This web site and Rep Plus do not collect any personal data about users.