Aiksaurus

Aiksaurus

Aiksaurus is an English-language electronic thesaurus. Aiksaurus is freely available under the terms of the GNU General Public License. It is available as a standalone program, but can also be integrated into other programs, such as the Abiword word processor.

Online Demo
This is a simple web version written in PHP.
Aiksaurus Sourceforge Page
This is the closest thing to an Aiksaurus homepage now. The GTK+ interface (for Linux users) is very good.
Aiksaurus.zip
A Windows version. It's not very pretty, and you might prefer the online version. But you can try it.

Aiksaurus was originally based on the Moby Thesaurus List which was made available through the efforts of Project Gutenberg. Since then, the data has undergone significant analysis and revision, creating an entirely new data model. As a result, Aiksaurus provides far more results than other thesauri, which tend to be based on data intended for printing.