Zyzzyva was originally created by Michael W Thelen. The source code is Copyright © 2005–2021 North American Word Game Players Association, D/B/A NASPA Games.
NASPA Zyzzyva is the same program as the historic "free" Zyzzyva, with some features and a mobile version added. NASPA Zyzzyva is intended for use by NASPA members as a benefit of membership.
NASPA Zyzzyva is proprietary software, built on the Qt Toolkit using its optional GNU Lesser General Public License (LGPL) version 2.1. Please see COPYING and LICENSE for details. Members can download the latest version from the NASPA Web site.
dropboxQt: NASPA Zyzzyva includes dropboxQt software, which is Copyright © 2018 prokarpaty.net, All Rights Reserved. See the license terms.
Zyzzyva logo: The main Zyzzyva logo (blue Z tile) was created by Jeremy Hildebrand and is used with permission.
Icons: The Quiz, Search, Definition, Word Judge, Cardbox, Preferences, Help, and Close Tab images displayed by Zyzzyva belong to the Tango Desktop Project (tango.freedesktop.org), and have been released to the Public Domain.
Bingo Stems: The lists of 6-letter and 7-letter bingo stems are used with permission from Complete Wordbook for Game Players, Mike Baron, 2004, Sterling Publishing. For information on the updated Scrabble Wordbook (Mike Baron, 2007, Sterling Publishing), see: https://www.amazon.com/SCRABBLE-Wordbook-Mike-Baron/dp/1402750862.
Lexicons (NASPA): NASPA Zyzzyva includes the NASPA Word List 2020 Edition (NWL2020) and 2018 Edition (NWL2018), NASPA School Word List 2020 Edition (NSWL2020) and 2018 Edition (NSWL2018) lexicons, all published by NASPA, for the exclusive use of NASPA members. Copyright © 2016–2020 NASPA, All Rights Reserved.
Lexicons (HarperCollins): NASPA Zyzzyva includes the Official SCRABBLE Words 2021 Edition (CSW21) and 2019 Edition (CSW19) lexicons, published under license with Collins, an imprint of HarperCollins Publishers Limited. This property is Copyright © 2011–2021 HarperCollins Publishers, All Rights Reserved.
Trademarks: SCRABBLE® is a registered trademark of Hasbro, Inc. in the USA and Canada. SCRABBLE™ is a trademark of Mattel, Inc. elsewhere. NASPA and its activities are neither endorsed by nor affiliated with Hasbro or Mattel.
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Copyright © 2005–2021 North American Word Game Players Association, D/B/A NASPA Games.