Anti-Spam SMTP Proxy Server implements multiple spam filters
Fast reliable local/remote file transfers, sync, tar create/extract
Fine-grained authorizations and single sign-on for SSH remote commands
FTPprune is a Perl script to manage a remote ftp archive
Allow remote ssh commands to survive connection failures
IPsec / IKEv2-based VPN software for Linux.
Various TCP/IP servers, clients and network management tools
An interactive FTP-like command-line BaseSpace download client
the OpenSSH VPN, without the VPN