The London Metropolitan University Ematrix is a complex category driven website built with Expression Engine. I’m using a wide variety of EE modules to achieve multiple ways for users to find content. Extensive use of Playa Relationships, Assets and Matrix, as well as Tagger and really useful additional functions like Shine PDF, RSS Parsonnel for multiple feeds, jQuery for more interactive front interfaces, featured content, and in depth integration with social media for accurate effective sharing.

http://www.celtelearning.org