For browsers there isn't much to say. But there is a little.
For file transfer putting,
FTP, there is a little to discuss. Not much, but a little.
Zippers, to zip and unzip. Stuffit or unstuffit. Compress or uncompress
text files or applications. But what is an application? A fancy text file.
For Windows you can mess around with others. But Winzip is the one you want.
Stuffit comes with the Mac.
The tools above are the minimum required for maintaining a website. Accessing your computers remotely may be beneficial as well. There are several methods which have become common for accessing your computer remotely. Here's one, as seen from a link on Yahoo!,
GoToMyPC: "In addition to flexible access from anywhere, GoToMyPC is far
easier to install and use and has faster performance and file transfer capabilities
than conventional remote control programs such as pcAnywhere. **verified by NSTL
testing laboratories** It is an amazingly inexpensive and simple solution compared
to other remote access technologies such as VPNs and RAS."