Speak Freely for Windows
Speak Freely for Unix
Speak Freely for Unix is compatible with a variety of
Unix systems.
It allows network
communications compatible with Speak Freely for Windows. The
Unix program lacks the graphical user interface of the Windows
edition, but supports all its compression and encryption modes.
The current version of Speak Freely for Unix is always posted in the directory:
http://www.fourmilab.ch/speakfree/unix/
See the manual pages for more details.