Selecting participants for workshops or speakers for conferences is hard. Usually, there are more qualified applicants than there are free spots. At the same time, organisers are often interested in diversifying their participants or speakers: in terms of topic, in terms of seniority, but also perhaps in terms of gender and ethnicty. This short talk presents a new open-source tool that helps making participant selection for conferences and workshops more transparent and can help reducing biases in the selection procedure.