PuTTY

The best thing is it is open source and free to use. We can use it directly without installing it. User interface is very good. The SSH tunneling feature is very helpful when establishing connection between local machine and servers.

Putty's featureset is unmatched and extremely powerful. The interface and configuration is intuitive and installation is implement I use it literally every day to connect and integrate with a wide range of server types.

It's a very easy and efficient way of logging into some devices