ContentRoller is an easy-to-configure, set up, customize, and use news, links, and blogging CMS environment that provides you the ability to have your own social news site like Digg, Yahoo Buzz, DZone, The Server Side, InfoQ, Slashdot, etc. ContentRoller can also be configured to look like a newspaper-based news site.
openPLM is a Web-based Product Lifecycle Management (PLM) application. It provides a configuration management system that manages all kind of files and data as documents in a product structure. It supports documents, parts, BOMs, part-document links, electronic signatures for objects, revision management, check in and check out for all files, plain text search using the Xapian engine, navigation between objects using Graphviz, and user management that allows sponsorship, delegation, and rights. Plug-ins are available for Thunderbird, OpenOffice/LibreOffice, FreeCAD, and Gedit.
Mowyw is an offline content management system, which means it is a kind of preprocessing system specifically designed for Web sites. It uses a very simple, easy to learn syntax, and is intended to be rather flexible. Headers and footers, includes (like SSI includes), and menus are implemented, with more features planned.
RedKite CMS is a Content Management System built on top of Symfony2 and Twitter-Bootstrap frameworks. It lets you manage the content of your website inline, using an interface designed to increase the quality of the user experience. You are not required to have technical skills related to Web programming to build a website using this CMS.
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.
Soxer is a Web publishing tool intended for the lazy programmer and designer. It allows the creation and maintenance of document driven Web sites, such as corporate sites, blogs, and project sites, and is also extremely useful for creating mockups for database driven applications. It forms a very thin layer above Sinatra to deliver data from a set of YAML files rather than a database.
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.