Lacks the finish of other compression packages, but then it is free.
Platform: Windows 8 compatible, Windows Vista 64-bit, Windows 7, Windows 7 64-bit, Windows Vista, Windows XP
Number of downloads: 20172
7-Zip has its own format for compressing files but it can create and read all of the common file formats such as .zip and .rar.
The main program window displays the files on your computer and compressed files appear as folders. From here you can view and extract files.
As well as the main program window 7-Zip integrates itself into the right-click menu in Windows Explorer. From this menu you can extract and test archives or add new files to them.