Paul writes: "The University of Minnesota Libraries Digital Library Development Lab has been working for three years on a library-centric authoring tool for building subject pathfinders, authoring course-related web pages, and general all-purpose pages. The project was written (simply and well-documented) around linux/apache/mySQL/PHP. It's about 34,000 lines of code and utilizes 40 underlying tables. It's being presented this week at the annual Digital Library Federation conference in New Mexico. See the site  for (GPL) license details, documentation, and download."