SPIP: free publication system on the Internet, mainly targeted at individuals, informal groups, and non-profit organizations

SPIP is an open-source, free publication system on the Internet, mainly targeted at individuals, informal groups, and non-profit organizations. It allows contributive writing and managing of Web sites having a magazine-like structure (i.e., articles and short stories contained in nested sections), while not needing any HTML skills (except for defining the layout templates). There are many additional features: public forums, petitions, keywords, syndication, an integrated search engine, and more.