SSH

OpenSSH on Windows
Port of OpenSSH server and client for Windows.
http://www.networksimplicity.com/openssh/

SSH Communications Security
Includes information about the SSH protocol. Has a variety of SSH products for sale, including clients, servers, and VPN software.
http://www.ssh.com/

SSH Master FTP Site
Binaries for SSH1 and SSH2 clients and servers for Windows and Unix.
ftp://ftp.ssh.com/pub/ssh

SSH Patch Repository
NCSA's collection of patches for SSH.
http://www.ncsa.uiuc.edu/UserInfo/Resources/Software/SSH/patch_repository/SSH_patches.html

SSHTools
Software suite providing Java SSH API, SSH Terminal, SSH secured VNC client, SFTP client and SSH Daemon. [Open source, GPL]
http://sourceforge.net/projects/sshtools/