WebPA is an open source online peer assessment system that was originally developed in 1998. It allows students to assess the individual contributions of group members, generating adjusted individual marks. This helps address criticisms of purely group-based assessment. Teachers benefit from WebPA's flexibility and ability to automate individual mark generation. Learners benefit from fair and confidential peer assessment that improves individual performance and team dynamics. Case studies show high student return rates and satisfaction with WebPA's use in higher education institutions.