ProjectPier is a Free, Open-Source, self-hosted PHP application for managing tasks, projects and teams through an intuitive web interface. ProjectPier will help your organization communicate, collaborate and get things done Its function is similar to commercial groupware/project management products, but allows the freedom and scalability of self-hosting. Even better, it will always be free.
"CKAN is the Comprehensive Knowledge Archive Network, a registry of open knowledge packages and projects (and a few closed ones)." Analagous to CPAN, but it's just listings.
"SubjectsPlus is a tool for dynamically managing a few parts of a library's website." Does subject guides, pathfinders, more. Open source by a guy in Ithaca
LibData is a library oriented web based application which provides authoring environments for subject pathfinders (Research QuickStart), course related pages (CourseLib) and general purpose web pages (PageScribe). LibData encompasses all of these applicat