The document summarizes the evolution of WebPA, a peer assessment system, from 1998 to 2008. It started as a paper-based system at Loughborough University to address issues with cumbersome and time-consuming assessment. It was rewritten in 2002 as PASS and again in 2004, and became open source in 2007. Usage grew exponentially after 2005 across many departments and universities. Feedback was positive, finding it improved satisfaction and produced honest, credible marking compared to traditional assessment.