PSLOGIN does secure logins over tcp/ip using diffie-hellman key exchanges, and strong stream cypher encryption. It can be used as an alternative to ssh.
MIRRORDIR mirrors a directory tree in every detail, including devices, ownerships, permissions, symlinks, hardlinks and access times, suitable for timed backups of disk drives. The minimal set of changes needed to make the original directory tree identical to the backup directory tree is executed. Can optionally create backup files before deleting, and store multiple revisions through any number of levels. A scripting language allows for custom excluding of special files. Works over ftp and mcfs. Also implements its own secure sockets for transparent strong encrypted file transfer, using a custom daemon.