freeSSHd is a free full-featured Telnet and SSH server with SFTP and port forwarding support.

Zilab Remote Console Server, as its name implies, is an advanced and convenient remote access server for Windows 2003/XP/2000/NT that works with console-based and DOS legacy applications. It runs as a regular network service for Windows 2003/XP/2000/NT and features multiple user support, SSL encrypted connections, transparent client side printing, advanced port forwarding with buil-in HTTP/SOCKS proxy , session logging and monitoring.

Java RFC2217 compliant Terminal server. JTS is one terminal server compliant with the RFC2217 specification. Before install the server you must install e configure the javax.comm package. The package for win32 and Solaris can be found in the sun site, for linux many implementation are available one is the rxtx. For test purpose this package can be used with the NVTCom library.