MobaXterm 

MobaXterm is an all-in-one program that embeds a wide variety of utilities for managing and administrating multiple computers connected to a common network. This way, advanced users can perform several tasks remotely.

Visually, the program has a well-crafted GUI, with big icons for buttons and well-placed tabs, so the user can easily access the desired utilities.

Moving on to features, MobaXterm has a complete package with plenty of functions and applications that a programmer, a web designer or an administrator needs in order to get the job done.

It supports SSH, Telnet, RDP, VNC, FTP, SFTP, Rlogin, XDMCP and Serial connections so you can create various types of sessions. Other than that, the integrated terminal can run Unix commands through bash, ls, cat, sed, grep, awk or rsync.

Also, thanks to X11-Forwarding, your remote display will use SSH for safe transportation, and the multi-tabbed interface will help you execute multiple tasks at the same time on numerous remote devices.

Other included features are a versatile session manager, a fully configured Xserver on X.org, and various add-ons and plugins.

In the end, I'd conclude that MobaXterm provides its users with plenty of features and tools so they can fulfill any type of remote management job.

Despite not being completely free, and having a time-consuming connection set-up, you should definitely give it a shot.