WinRAR is an effective archive manager that can unpack CAB, ARJ, LZH, TAR, GZ, ACE, UUE, BZ2, JAR, ISO, 7Z, and Z archives in addition to offering full support for RAR and ZIP archives. Although its RAR format only comes in second for compression, it is typically the quickest for both packing and unpacking files. Although RAR files aren't built into Windows or Mac, numerous other compression tools can still open them. Despite its name, WinRAR is compatible with Windows, OS X, and Linux.