Pi Media Center (pimc) (formerly omxremote)
pimc is a simple smartphone interface for remotely controlling your media on the raspberry pi. It uses the omxplayer binary to actually do the heavy lifting and jquery-mobile for the UI.
Install the pimc deb file on your raspbian system. It has dependencies on python-pexpect and omxplayer >= 0.3.5.
By default, pimc looks in /media for your music, photos and videos (edit /usr/lib/pimc/config.py to change this). Connect to your pi on port 55555 with a web browser to access pimc.
pimc also looks up movie information from IMDB for more attractive and informative movie browsing and will use folder.jpg and ID3 tags for audio browsing.