Elefant is a full-featured, but refreshingly simple CMS and PHP Web framework. It features an intuitive, streamlined admin interface, a tightly integrated WYSIWYG editor, dynamically embeddable content objects for building dynamic Web sites without touching code, and an extremely fast, secure, and flexible framework for add-ons and themes. The core CMS includes page editing, a blogging engine, site navigation, file and user management, automatic version control, a tool for translators and multilingual site management, and an in-browser theme/layout editor. It is also extensively documented and has a small but friendly and active developer community.
I, Librarian is a PDF manager or PDF organizer that allows individual researchers or a group of researchers to create an annotated collection of PDF articles. Users may build the virtual library collaboratively, thus sharing the workload of literature mining. It enables smart browsing and fast searching in reference data and PDF files, and includes an advanced tool for mining scientific literature from PubMed, PubMed Central, NASA ADS, arXiv, IEEE Xplore, and HighWire Press.
MojoMojo is a Web2.0 wiki with AJAX live preview, hierarchical structure, tags, diffs, pluggable syntax, permissions/ACL, attachments, RSS feeds, a photo gallery, edit conflict resolution via 3-way merge, themes/skinning, localization, built-in full-text search, and a reverse index. Since it's built on top of the Perl Catalyst Web framework, MojoMojo supports any Web server, and includes its own standalone one. It also support any database backend supported by the DBIx::Class ORM, and has been successfully tested with PostgreSQL, SQLite, and MySQL.
Wolf CMS simplifies content management by offering an elegant user interface, flexible templating per page, simple user management and permissions, and the tools necessary for file management. It is a fork of Frog CMS, which was itself a PHP migration of the Ruby-on-Rails app Radiant CMS. Wolf is now forging its own development path, although a family resemblance with these two systems can still be seen.