Drupal is content management software. It's used to make many of the websites and applications you use every day. Drupal has great standard features, like easy content authoring, reliable performance, and excellent security. But what sets it apart is its flexibility; modularity is one of its core principles. Its tools help you build the versatile, structured content that dynamic web experiences need. It's also a great choice for creating integrated digital frameworks. You can extend it with any one, or many, of thousands of add-ons. Modules expand Drupal's functionality. Themes let you customize your content's presentation. Distributions are packaged Drupal bundles you can use as starter-kits. Mix and match these components to enhance Drupal's core abilities. Or, integrate Drupal with external services and other applications in your infrastructure. No other content management software is this powerful and scalable. The Drupal project is open source software. Anyone can download, use, work on, and share it with others. It's built on principles like collaboration, globalism, and innovation. It's distributed under the terms of the GNU General Public License (GPL). There are no licensing fees, ever. Drupal will always be free.

* Build applications quickly: Many common components are included: translation tools, database access, code profiling, encryption, validation, and more. * Use specific libraries and tools: Extending existing components and adding new libraries is very easy. * Write commercial applications: Uses the BSD license, so you can use and modify it for commercial purposes. * A very fast framework: Benchmarking a framework is hard and rarely reflects the real world, but Kohana is very efficient and carefully optimized for real world usage. * Good debugging and profiling tools: Simple and effective tools help identify and solve performance issues quickly. * Know what the framework is doing: Very well commented code and a simple routing structure makes it easy to understand what is happening. * Work with objects and classes: This is an OOP framework that is extremely DRY. Everything is built using strict PHP 5 classes and objects. * Write your own code: There are no code generators and endless configuration files, so setting up is fast and easy. * Community support: A very active community forum and IRC channel means that most questions are answered very quickly.