Recommendations for personal information manager

[Adam]

I've never found a good personal information manager (PIM) for FreeBSD.
All I really want is a good GUI with a nice tree-structure for storing
notes. Encryption support is also beneficial, but not absolutely
necessary.

There are a couple for Win32 that I really like, but there's no *nix
version available for them:
http://www.tranglos.com/free/keynote.html
http://www.pimexonline.com/Products/pimex.htm

Can anyone recommend one? It would really help organize my life if I
found a good one.

Thanks,
-- 
Adam <blueeskimo at gmx.net>