Since these applications (in this example, games) are "open source" programs, they may also be available for the Windows or Mac operating systems (like '''Extreme Tux Racer''', or '''Planet Penguin Racer'''). Just as an interesting fact, Planet Penguin Extreme Tux Racer was first developped developed for Linux (the original game name was "Tux Racer"). The name Tux refers to the official mascot of the Linux operating system which is a Penguin.