ExpressionEngine is one of a powerful commercial CMS system. When they introducing the version 2, they stopped the free core version and after 2 years it is yet again back with it’s core features as a fermium product. as a developer I started digging in to it in my local environment and the first impression was pretty great.
It has a pretty cool admin panel and the colour scheme is making me to stay for longer hours without a distraction. also it has some interesting plug-in features and interestingly now it has the page module integrated with the ExpressionEngine core version. additionally now it has an optional theme called Agile Records and which is really helpful for a fresher to start with. ExpressionEngine 2 core is a best freemium product to start learning about the ExpressionEngine.