ORSEE is a web-based Online Recruitment System for Economic Experiments. Key features: attribute query selection, random recruitment, experiment calendar, reputation system, automated mailing, pdf output, complete documentation.
Igino Corona and Davide Ariu and Giorgio Giacinto, "HMM-Web: a framework for the detection of attacks against Web applications", IEEE ICC 2009. Anomaly detection of server-side web attacks based on Hidden Markov Models (unsupervised learning).