The installer packages above will provide versions of all of these (except PuTTYtel), but you can download standalone binaries one by one if you prefer.
(Not sure whether you want the 32-bit or the 64-bit version? Read the FAQ entry.)
putty.exe
(the SSH and Telnet client itself)pscp.exe
(an SCP client, i.e. command-line secure file copy)psftp.exe
(an SFTP client, i.e. general file transfer sessions much like FTP)puttytel.exe
(a Telnet-only client)plink.exe
(a command-line interface to the PuTTY back ends)pageant.exe
(an SSH authentication agent for PuTTY, PSCP, PSFTP, and Plink)puttygen.exe
(a RSA and DSA key generation utility)putty.zip
(a .ZIP archive of all the above)