Finding open source that works in Hebrew is often problematic. I am sure that there must be other languages with the same problem.
Anyway here are a couple of places I know of offering information about and/or downloads of opensource software in Hebrew
http://www.we-cms.info/blog/free-hebrew/
Collection of Free programs
Do you know of other free software programs in your language (or mine)?
Tags: internationalization, translation, ui, unicode