Putty is a freeware application for terminal emulation.
This download contains all the putty applications (excluding Puttytel), such as: Putty (telnet/ssh client), PSCP (SCP client), PSFTP (SFTP client), Plink (command-line interface to the putty back end), Pageant (SSH authentication agent for Putty, PSCP and Plink), Puttygen (RSA and DSA key generation utility) and complete help files.
Overall this Putty download is a brilliant package, highly recommended.
Warning: Use of PuTTY, PSCP, PSFTP and Plink is illegal in countries where encryption is outlawed.