From: Craig on
F/OSS & cross-platform: makes you erudite & sh*t.

> Artha is a free cross-platform English thesaurus that works
> completely off-line and is based on WordNet. Stable releases for
> download are currently available for GNU/Linux and Microsoft Windows;
> it is tested on major Desktop Environments like GNOME, KDE, Xfce, etc
> and on Microsoft Windows XP, Vista and 7. Artha is released under the
> GNU General Public Licence version 2; hence you are free to
> copy/redistribute it.
>

<http://artha.sourceforge.net/wiki/index.php/Home>

--
-Craig