I just found this today, I guess I googled differently this time around..

His list of useful software is, well, useful! I already think DateBk4 [gorilla-haven.org] (now DateBk5) is the best calendar application for PalmOS ever – I love that thing.

I knew vaguely about Keyring [gnukeyring.sourceforge.net], but once I checked it out, WOW!