SPIP (Système de Publication pour l'Internet) is a free software content management system designed for Web site publishing, oriented towards online collaborative editing.This software, known for its easy setup, use and maintenance, is widely used by networks of people, in public or private institutions. The last P in the word SPIP both stands for Partagé (shared) or Participatif (participative), in the sense that the software is especially tailored for collective online editing.