Free powerful cms software for linux

Plone is an out-of-the-box ready content management system that is built on the powerful and free Zope Application server.
Plone CMS requires minimal effort to set up, is deeply flexible, and provides you with a system for managing web content that is ideal for project groups, communities and intranets.
Plone is a content management framework that works hand-in-hand and sits on top of Zope, a widely-used Open Source web application server and development system. To use Plone, you dont need to learn anything about Zope; to develop new Plone content types, a small amount of Zope knowledge is helpful, and it is covered in the documentation.
Zope itself is written in Python, an easy-to-learn, widely-used and supported Open Source programming language. Python can be used to add new features to Plone, and used to understand or make changes to the way that Zope and Plone work.
By default, Plone stores its contents in Zopes built in transactional object database, the ZODB. There are products and techniques, however, to share information with other sources, such as relational databases, LDAP, filesystem files, etc.
Plone runs on Windows, Linux, BSD, Mac OS X, and many other platforms; easy click installers are available for Windows and Mac OS X, and RPM packages are available for Linux. For full information, see Download.
Main features:
- Plone is easy to install. You can install Plone with a a click and run installer, and have a content management system running on your computer in just a few minutes.
- Plone is easy to use. The Plone Team includes usability experts who have made Plone easy and attractive for content managers to add, update, and mantain content.
- Plone is international. The Plone interface has been translated into over 20 languages, and tools exist for managing multilingual content.
- Plone is standard. Plone carefully follows standards for usability and accessibility. Plone pages are compliant with US Section 508, and the W3Cs AAA rating for accessibility.
- Plone is Open Source. Plone is licensed under the GNU General Public License, the same license used by Linux. This gives you the right to use Plone without a license fee, and to improve upon the product.
- Plone is supported. There is close to a hundred developers in the Plone Development Team around the world, and a multitude of companies that specialize in Plone development and support.
- Plone is extensible. There is a multitude of add-on products for Plone to add new features and content types. In addition, Plone can be scripted using web standard solutions and Open Source languages.
- Plone is technology neutral. Plone can interoperate with most relational database systems, open source and commercial, and runs on a vast array of platforms, including Linux, Windows, Mac OS X, Solaris and BSD.

Simply Powerful ToolKit in short SPTK is a powerful widget toolkit based on the Fast and Light ToolKit (FLTK).
The goal of this library is to create the easy-to-use, compact and effective library of controls to extend the abilities of FLTK library.
It is geared for business-style application development with database support (ODBC). All the widgets support database connectivity. A special CDialog class makes editing database records very easy. Every widget can be connected to the field, and CDialog can be connected to the database table.
Most of the controls are database-bound. If you place them on the CDialog-derived window they can load and save information from/to database.
This is the first release version of my controls(widgets) library that was designed to work with FLTK. Im using it for about a year in the production project.
Enhancements:
- Fixed a bug in CField::asString() that cause returning an empty string for some non-empty fields.
- Added couple of small fixes for better error hanling in CRegistry.

RSS 2 CMS it is a system that converts RSS Feeds into the content of a CMS system. In other words CMS content syndication through RSS. It is built in such a flexible way that it doesnt matter which CMS system it connects to. Settings inside this free open source script let you define how you access the data base.
Main features:
- Import RSS feeds into the CMS of your choice.
- Schedule for automatic update for your favorite feeds into your CMS content.
- Decide which articles you import into your CMS by creating keywords for each feed.
- Use the content management feature to insert content if you dont like the interface of your CMS.
- Switch easy betweer CMS settings.
- Add your own settings if the CMS template is not listed.
Enhancements:
Fixed:
- ImportCMS() function didnt include prefix to the feeddata table.
- Import to Joomla gave double texts in articles and the url had double http:// in them.
- Cms update error messages were shown before logging into the system.
New functionality:
- Option to strip the http:// from the url that is being exported to CMS.
- Usage is [$url=nohttp$].
- CMS authors query is added to CMS Settings.
- Selection of author that adds content can be inserted with the [$authorid$] varaible.
- Misc variables for dates and time are added.
- Installation script is added for easy install.
- Settings for WordPress CMS are added.

TribalCMS is a powerful content management system (CMS) and extranet.
TribalCMS is easy to use, allowing a low-budget or simple Web site to be built quickly and at low cost, yet it is backed up with features that make it powerful enough for an enterprise-level extranet, intranet, or large Web site.

It includes an author-publisher system, version control for full audit trails, extranet functionality (based on users and overlapping groups), and many content types: Web pages, downloads, news, events, forums, adverts, hyperlinks; other types can be added. For developers, it can be used as a framework for advanced applications.