It runs on a variety of POSIX-based platforms.m Remote NG ( https://mremoteng.org/ )A fast, easy to use GUI using putty as its base.Free Lan ( https://github.com/freelan-developers/freelan )Full-mesh, secure, easy-to-setup, multi-platform, open-source, highly-configurable VPN software. Peer VPN ( https://github.com/peervpn/peervpn )Virtual network built by Peer VPN uses a full mesh topology.Haraka ( )A high-performance, pluginable SMTP server written in Java Script. Open SMTPD ( https://opensmtpd.org/ )Secure SMTP server implementation from the Open BSD project.
DSH ( )Dancer's shell / distributed shell - Wrapper for executing multiple remote shell commands from one command line.putty ( )Free and open source terminal emulator.
Dropbear ( https://asn.au/dropbear/)Dropbear is a relatively small SSH server and client.
Exim ( )Message transfer agent (MTA) developed at the University of Cambridge.
Mail Catcher ( )Ruby gem that deploys a simply SMTP MTA gateway that accepts all mail and displays in web interface. Qmail ( Sendmail replacement.h Mail Server ( https:// Mail Server is a free, open source, e-mail server for Microsoft Windows. Zone-MTA ( https://github.com/zone-eu/zone-mta )Modern outbound SMTP relay built on and Level DB.
Bind ( https://org/downloads/bind/ )The most widely used name server software.dnsmasq ( lightweight service providing DNS, DHCP and TFTP services to small-scale networks.