ExpressionEngine, created by Ellis Labs, is a commercial Content Management System (CMS) based upon an Open Source foundation. With its Open Source foundation, ExpressionEngine's codebase is 100% open, transparent, and extensible.
The core of ExpressionEngine is built on CodeIgniter, the Open Source PHP framework, which is used by hundreds of thousands of PHP developers across the world. CodeIgniter has become the application framework of choice for many PHP developers throughout the world.
Some of the reason behind Expression Engines popularity are listed below:
Now that you know what makes ExpressionEngine so useful to web designers and developers, let's see some real world good looking examples.
Polarseal Tapes & Conversions had a new website designed & built by Design Fresh earlier this year. We… 
Greg Devenish, PolarSeal Tapes and Conversions
Thanks’ very much to Design Fresh for all the hard work put into helping build our website. We… 
Kerrie, The Ferry House Inn
I am very, very, pleased and satisfied with my new website which was designed and created by Design… 
Caroline Bullock, CCB Sewing