Switching between fullscreen programs
I know that alt-tab shortcut usually works for switching between windows on the desktop, but what about switching between programs, especially when you are at fullscreen in one (such as a game) that doesn't support an alt-tab shortcut. How do you get off from it to a desktop program running without having to quit?
For example, in saturday when I played some Battle for Wesnoth with my sister and got bored with the built in music we turned that music off and wanted to play something from our play list using beep-media-player. However being stuck in the middle of the game we didn't want to quit and then open beep-media-player just to get some music playing in the background. There ought to be a way to simply switch away from the fullscreen running program to beep-media-player and back?