Movian is a media center primarily intended to be used directly on a TV.

It is currently available for Linux, Mac OS X, Raspberry Pi, Playstation 3, Android and Google Chrome Apps

A quick glance at some of its features:

Playback of video and audio

Installable applications and plugins

Unified search

View photos and images

Live TV streaming from Tvheadend

Automatic "over-the-air" upgrades

There is a full list of features in the wiki.

Reach the crew in #movian on efnet or freenode