PuTTY is a free to use client for SSH, Telnet, RLogin, and also “raw” TCP connections. This allows you to connect to various servers and send and receive data. PuTTY is very light weight, not requiring an installation. A few amazing things you can do with PuTTY for example are, using it as a HTTP Client, using it for Whois, connecting to SSH Servers, and connecting to your printer to manage it.
PuTTY is very straight forward, the only part that isn’t, are the what you have to type in the PuTTY window. Below are a few videos of PuTTY being used in amazing ways.