WinSSHTerm

WinSSHTerm: Simple-to-use GUI for PuTTY or KiTTY that makes it easier to manage multiple SSH sessions and offers support for file transfers and X applications

WinSSHTerm is an excellent program designed to work as an additional layer for PuTTY and KiTTY, the two most popular SSH clients - WinSSHTerm is an extended GUI if you will. The software allows opening multiple sessions in different tabs, an important feature that is lacking natively in both PuTTY and KiTTY.

Since WinSSHTerm is an extension GUI to puTTY and KiTTY, the user must have one of these 2 clients installed, the application doesn't include them by default. However, if you don't have them installed, WinSSHTerm has the option to download them from within the application, to save up some time.

All in all, if you use one of these SSH clients a lot, WinSSHTerm is a must to install on top since it provides some of the features that are lacking from PuTTY or KiTTY.