PuTTY is a free implementation of Telnet and SSH for Windows and Unix platforms, along with an xterm terminal emulator. PuTTY is a client program for the SSH, Telnet and Rlogin network protocols.
These protocols are all used to run a remote session on a computer, over a network. PuTTY implements the client end of that session: the end at which the session is displayed, rather than the end at which it runs.
PuTTY (the Telnet and SSH client itself)
PSCP (an SCP client, i.e. command-line secure file copy)
PSFTP (an SFTP client, i.e. general file transfer sessions much like FTP)
PuTTYtel (a Telnet-only client)
Plink (a command-line interface to the PuTTY back ends)
Pageant (an SSH authentication agent for PuTTY, PSCP, PSFTP, and Plink)
PuTTYgen (an RSA and DSA key generation utility).
Latest news
2011-07-12 PuTTY 0.61 is released
PuTTY 0.61 is out, after over four years (sorry!), with new features, bug fixes, and compatibility updates for Windows 7 and various SSH server software.
2010-05-17 Google listing confusion
Several users have pointed out to us recently that the top Google hit for "putty" is now not the official PuTTY site but a mirror that used to be listed on our Mirrors page.
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