Okay, I promised you that I would go over some/most applications available in the Ubuntu Software Center. First up is 7zip located under the Accessories. Here is the information:

7zip is a “windows-only” compression tool, serving as an alternative to Winzip. This 7zip install is a command-line only port of the original application. It was created by a developer, not the original creator. It can open several different formats including zip, rar, rpm, iso, and tar. As well as many others. Here is the most important part, it opens 7z files.

Again, remember that it is command-line only!

More >