Rπ3 Server

Raspberry Pi 3 with Raspian

MySQL, Apache2, NAS, standalone music player with 4 button control and LCD screen and HDMI mediaplayer.
Python driven info screen mounted in the front of the case which is used for music player when play mode on.
Chassis is made out of WRT54 router.

Simple PHP server home page with some information and controls

Parts

Raspberry Pi 3 board

WRT54 Router
Better to find broken one as only case is needed. These are most popular routers and easy to find with cheap price.

HD44780 16×2 LCD Display

+ I2C module for more convenient connectivity