WHM (Web Host Manager) is used to admin cPanel accounts, it's very common on reseller hosting accounts and VPS.
WHM have many features and it also have a "Add-On" menu where you can install third-part software.
For example I found very usefull Addons at www.CheckServer.com , for example something like a small "Windows Explorer"
I'm searching at this moment a FTP addon, where I can manage upload/download to a external server.
Of couse I can do it with commands by SSH, but its more easier with a gui interface.