The Radio Music you hear from the Radios in Portal.
Still Alive, Portal end credits, High Quality.
This is the desktop back ground themes for Portal, some of the best themes for a computer.
I took the Portal wallpapers and put them all together. The "By FJS" isn't on the wallpaper. My mistake. Size: 1280x1024
The music from the ending title credits of half-life 2: Portal.