XNotesPlus provides a means to post small notes on your
X-Windows desktop.
These notes can be shared as memos with your PalmOS device.
The XNotesPlus web page at http://www.graphics-muse.org/xnotes/xnotes.html contains full installation and use instructions. I suggest using the prebuilt binaries if you can.
One caveat is that you need to create an ``Xnotes'' category on your PalmOS device, if you intend to export notes.