Driver for USB networking(http://www.lucid-cake.net/osx_zaurus_usb/index_en.html) between Apple Macs running Mac OS X and Sharp Zaurus handhelds.
HOWTO(http://www.dsitri.de/php/projects/project.php?project=Zaurus%20X-gcc) Cross compile Zaurus apps using Apple developer tools on Mac OS.
The QuantumSTEP(http://www.dsitri.de/wiki.php?page=myPDA-Zaurus-Edition) project is designed to run MacOS X applications on the Sharp Zaurus. There is also the myPDA Zaurus Edition, which provides a MacOS X compatible GUI for the Sharp Zaurus.
Osync(http://cs-people.bu.edu/anurodhp/Opie/Osync.htm) is intended to sync safari, itunes, ical and address book with Opie.
The Opie sync client for Mac OS X(http://max.macbay.de/) provides datebook sync (except recurrences), addressbook sync (as complete as possible) and todolist sync (except recurrences).
The OSXZAURUS site(http://osxzaurus.blogspot.com/) is intended to be a point of reference for those brave souls out there who are trying to use MacOS X with the Linux based Sharp Zaurus PDAs.