Langur
Langur is a desktop thesaurus for RISC OS computers. It uses thesaurus databases from the OpenOffice.org project.

Requirements
In order to run, Langur requires the following to be present on your system:
- RISC OS 3.50 or greater.
- Acorn URI version 0.12 or greater.
- SharedUnixLibrary version 1.02 or greater.
Download
You can download the current version here.
- v1.00
- 16th October 2004. Current version
You will also need to download at least one thesaurus database from http://lingucomponent.openoffice.org/thes_dic.html.
Update: The above link now contains files for Open Office 2, which will not work with Langur. I have provided a mirror of the files that I tested Langur against here.
Documentation
You can read the documentation online.
Licence
This program is released under the GPL.