If you are not familiar with message boards then this is an acceptable question, but not for long. You will find yourself getting a lot of crap if you do not use search engines like www.google.com 1st. Try www.google.com/linux for linux specific info. I searched for "zaurus software links" this is what I found.The first site to look at is:
http://killefiz.de/zaurus/
Then check out the download or software sections at:
http://www.zaurusoft.com/
http://zaurus.loveslinux.com/
http://www.myzaurus.com/
http://www.zauruszone.com/
http://zaurus.sourceforge.net/
http://www.zauruszone.farplanet.net/wiki/index.php?OpenZaurus
http://www.insomniq.com/zaurus.jsp
http://en.hancom.com/index.html