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If you're running Mac OS X, Chuck Houpt has put together a packaged version that will run out of the box.

For KDE users, Michael Pyne and Maksim Orlovich have written a KDE Screensaver based on the Asciiquarium.

Claudio Matsuoka has created a live wallpaper for Android!

J. Sommer wrote a screensaver, so you can finally run the ASCIIQuarium on Windows!