MindTunnel - A java implementation of an SSHD

MindTunnel - A java implementation of an SSHD: "MindTunnel v0.96

MindTunnel, release 0.96 - Dec 06, 1998

MindTunnel is an entirely FREE(*) SSH (currently v1.5) server program
written in pure Java. It was implemented for fun (or for completeness
of the mindbright ssh-package :-) and is not intended to be a
replacement for 'the real thing'. However, it can be used as a minimal
sshd, supporting only tunneling (i.e. port-forwarding). It has
RSA-authentication as the only means of authentication, the
'authorized_keys' file has changed to be handled in a central place

for all users (hence you don't need to give the users shell-accounts
on the server-machine).

(*) Only restriction is that you can't derive commercial work from it
without our written permission."