Drupal is a free software package that allows an individual or a community of users to easily publish, manage and organize a wide variety of content on a website.

Tens of thousands of people and organizations are using Drupal to power scores of different web sites, including

Features

· Collaborative Book - Our unique collaborative book feature lets you setup a "book" and then authorize other individuals to contribute content.
· Friendly URLs - Drupal uses Apache's mod_rewrite to enable customizable URLs that are both user and search engine friendly.
· Modules - The Drupal community has contributed many modules which provide functionality that extend Drupal core.
· Online help - Like many Open Source projects, we can't say that our online help is perfect but have built a robust online help system built into the core help text. Available to you on your own site.
· Open source - The source code of Drupal is freely available under the terms of the GNU General Public License 2 (GPL). Unlike proprietary blogging or content management systems, Drupal's feature set is fully available to extend or customize as needed.
· Personalization - A robust personalization environment is at the core of Drupal. Both the content and the presentation can be individualized based on user-defined preferences.
· Role based permission system - Drupal administrators don't have to tediously setup permissions for each user. Instead, they assign permissions to roles and then group like users into a role group.
screenshot .
· Searching - All content in Drupal is fully indexed and searchable at all times if you take advantage of the built in search module.

What's New:
· Drupal has a new core theme: Bartik!
· Numerous fixes to the upgrade path, including basic tests. Getting very close! :)
· Numerous important security fixes.
· Numerous accessibility improvements.
· Setting up Private files is now optional, rather than required.
· Registry made more fool-proof and robust.
· Redesign of Field UI "Manage Display" screen, to reflect multiple view modes. Field UI screens are now also extensible from contrib.
· Re-implementation of Overlay without jQuery UI, to address numerous critical issues.
· User creation setting now defaults to "Visitors, with admin approval" for security.
· Installation will no longer fail when settings.php is not present. Nice usability improvement.
· Required modules are once again shown on the modules page.
· Many improvements to input formats and filters.
· Table prefixes are now per-database connection, rather than global.

Download: Drupal 7.10 (3.4 MB) | Drupal 6.24 (1.3 MB) | Drupal 5.23 (853 KB) | Screenshots | Homepage