From the official SilverStripe website

Content Management the way it was meant to be Powerful enough for any website or intranet design and simple enough for your Mum to use
* Simple. Intuitive and user-friendly
* Flexible. MVC framework
* Scalable. From 1 page to a million
* Fast. As responsive as a desktop app thanks to native Ajax support
* Standards Compliant. Fully XHTML compliant
* Modular. Easy to extend
* Template Freedom. No restrictions on the look and feel of your site
* Open source. It’s free in every sense of the word! (BSD)
* Cross platform (Windows/Linux/Mac) and easy to install (PHP based)



SilverStripe is an intuitive content management system atop a powerful programming framework.

We've rethought how content editors, developers, and designers should build and manage websites. We've arrived at a unique combination that empowers all three to get their jobs done more quickly and with more flexibility.

You get the benefit of SilverStripe being free, with the backing of a vibrant open source community who support, test, and contribute to the SilverStripe product. But you also get the security of a project backed by a professional company who can help you make best use of the system.

1. Content Editors: Smile!

We're making our content mangement system the most powerful, efficient to use, and intuitive means for someone to edit their site.

We use terminology that people editing websites understand. For clarity's sake, anything geeky or related to hardcore development of a website is excluded from the interface. We're happy for others to claim to have the same features, because we focus on there being fewer steps and a more pleasurable experience. This is hard to do: how many years did we suffer before the iPhone showed a truly intuitive way to organise a phone's features?

This principal covers everything a content editor does: Adding a page, a link, or image--even editing images online. We let you drag and drop pages to manipuate your sitemap and menus, since that's the most logical and time-efficient way for you do it. But we also give you powerful features like staging sites, multilanguage support, human-friendly URLs, and comparing different versions of page over time. Watch our eight minute video then Try our online demo. 

2. Coders: Stretch out! 

When developing a SilverStripe website you'll be staying up all night because you're having fun, not because you're stuck or moving at a slow pace.

Do you enjoy Ruby on Rails or Django as a way to quickly write stuff in fewer lines of code thanks to concepts like ActiveRecord, ORM and MVC? You'll love our Sapphire framework, giving you contemporary object-oriented goodness, focused on building database-driven websites. It runs on PHP (5.2+) so it's easy to learn and to find webhosting.

The framework lets you rapidly code up the "objects" your project uses (e.g. staff members, products, customers, along with their relationships). You then add a few lines of code and find SilverStripe has automatically added tables and columns to the database, let you use them in your website templates, and has added new "page types" and fields into the CMS for the content editor to utilise. As we said; stay up late for fun, not for your boss.

This approach allows SilverStripe to be much more modular, as demonstrated by our rapidly created free SilverStripe modules:

  • ecommerce
  • blog
  • forum
  • flickr
  • Google maps

Learn more by viewing our four minute developer overview video. To get into SilverStripe coding and the Sapphire framework, run through our SilverStripe Developer Tutorials

3. Designers & marketers: get creative!

Designers and marketing gurus will love that SilverStripe is skinless. Spend a day gathering inspiration and hand-craft stunning Photoshop website designs. Then turn them into elegant XHTML and CSS and pass them to SilverStripe to manage. The power is back in your creative hands. See the design flexibility for yourself in our showcase and free themes directory!

Download:http://www.silverstripe.com/silverstripe-web-application-framework/
Demo:http://demo.silverstripe.com/