Drupal is a modular content management system, forum, blogging and community engine. It is database driven and can be used with MySQL, MySQLi, PostgreSQL, and SQLite. Its features include (but are not limited to) discussion forums, Web-based administration, theme support, a submission queue, content rating, content versioning, taxonomy support, user management with a fine-grained permission system based on user roles (groups), error logging, support for content syndication, locale support, and much more. It is considered to be an excellent platform for developers due to its clean code and extensibility, and it can also be used as a Web application framework.
Tinypug is a system for building portals that enables innovation communities. The idea is to go beyond one-off statistical surveys (which tend to only verify an existing paradigm) to foster real collaboration and anecdotal feedback from users/customers. A company seeking to gather more feedback on its products usually has to resort to a few existing stand-alone mechanisms such as polls and comments on product listings. But Tinypug puts all of these tools together in one place. It also makes it easier to integrate with call center applications for the active gathering of customer feedback. It's not a content management system as much as it is a feedback management system. It provides in-browser message boards, polls, surveys, and user-submitted ideas with voting. There's also a basic content system that enables you to upload and publish pages and images. You can customize the look of the site using themes and extend its functionality using add-on libraries.
The Ninja project is an attempt to develop an alternative Nagios GUI with the aim of being the most useful Open Source Web front end for Nagios. It improves searching and filtering and scalability. It supports templates and skins for customizing appearance, and supports several databases. You can use the components of Ninja in combination with the CGI scripts of the original Nagios Web GUI or as replacements for them.
LemonLDAP::NG is a modular Web SSO based on Apache::Session modules. It simplifies the building of a protected area with a few changes in the application. It manages both authentication and authorization and provides headers for accounting, so you can have full AAA protection for your Web space. LemonLDAP::NG is a complete rewrite of LemonLDAP. All components needed to use it and to administer it are included in the tarball. However, all modules developed for LemonLDAP may not work with LemonLDAP::NG.
WebsiteBaker is an easy, secure, flexible, and extensible content management system. Templates can be created within minutes and are powered by (X)HTML, CSS, and jQuery. Droplets provide a new and revolutionary way of inserting PHP code everywhere you want. Many extensions are available and can be installed and used with two clicks. A flexible API is also provided.