WinSSHD 

Fast, robust, easy to use SSH server for Windows with secure TCP/IP tunneling; SFTP and SCP file transfer; VT100/xterm; Windows group, domain account support; public key and Kerberos authentication; virtual accounts; powerful configuration.
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Tunnelier 

Free SSH client for Windows with graphical SFTP; VT100, xterm; dynamic and manual TCP/IP tunneling; auto-reconnect; scriptable console-mode SFTP; single-click Remote Desktop forwarding; FTP-to-SFTP bridge; Kerberos; public keys. Free individual use.
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TN3270 Plus 

TN3270 Plus is a flexible, efficient and inexpensive telnet client application for connecting Windows PC users to IBM mainframe, AS/400, and UNIX systems via TCP/IP. TN3270 Plus delivers 3270, 5250, VT100, VT220 and ANSI terminal emulation.
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