[http://www.zyzzyva.net Zyzzyva ], by [[Michael Thelen]], is a word study and wordadjudication [[software|program]]. It is freely available and runs under Linux, Windows Vista, Windows XP,
Windows 2000, Windows 98, Windows ME, Mac OS X 10.3.9 or later (Panther),
Mac OS X 10.4 (Tiger), and Mac OS X 10.5 (Leopard).
It has been used as at software self-lookup stations at many North American [[SCRABBLE]] [[tournaments]],
including BAT, Oregon TILE, the Dallas Open,
the [[National SCRABBLE Championship]]
[[National School SCRABBLE Championship]].