Arabeyes Project
Arabeyes is a Meta project aimed at fully supporting the Arabic language in the Unix/Linux environment. It is designed to be a central location to standardize the Arabization process. Arabeyes relies on voluntary contributions by computer professionals and enthusiasts all over the world.
http://www.arabeyes.org/

Omega Project [This link generated an error during the last automatic check]
Omega is an extension of TeX developed by John Plaice and Yannis Haralambous. Its first release, aims primarily at improving TeX's multilingual abilities.
http://omega.cse.unsw.edu.au:8080/index.html