VNC for demoing a (web) app

[Felix E. Klee]

For easy remote demoing of a (web) application, I'm looking for VNC
software with the following features:

* The connection should be encrypted, if possible.

* The client should be very easy to install, on Windows systems, on
  MACs, and on LINUX systems.  Furthermore, the client should be
  available free of charge.

* The server must be able to run on an i386 UNIX (LINUX, FreeBSD,
  whatever).

* Shared connections should be possible.

Any idea what software meets my demands?

I guess that TightVNC may be an option, if I go without encryption.
TightVNC via SSH would be too hard to set up on the client side, for
people who don't know that technology.  I also had a look at RealVNC
Server Edition.  However, it doesn't seem to be for me: The client is
not free (if encryption is needed), and the Personal edition only runs
on Windows.

-- 
Felix E. Klee
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