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 of the University of Calgary. It runs under Microsft 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.