PuTTY is a free implementation of an SSH and Telnet server, as well as a terminal emulator.

Information at https://www.chiark.greenend.org.uk/~sgtatham/putty/ with all credit to the original author, Simon Tatham.

We recommend downloading putty.exe under Alternate Binary Files (32-bit or 64-bit) at https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html. This is a standalone version with no installation.