Open Source, it has two main advantages (besides being free of course): it automatically supports in the decompression several types of files (such as zip or rar ect) and it has an excellent decompressing format itself (which is 7z).

The graphic interface is simple and linear, although lacking a bit in colour. It is very simple to use. although overall I don't think it is on the same level as Winrar.

With an easy-to-use interface, IZArc provides support for most compressed and encoded files, as well as access to many features and tools. It allows you to drag and drop files from and to Windows Explorer, create and extract archives directly in Windows Explorer, create multiple archives disks, creating self-extracting archives, repair damaged zip archives, converting from one archive type to another, view and write comments and many more. IZArc has also build-in multilanguage support.

IZArc automatically supports these archive formats: 7-ZIP, A, ACE, ARC, ARJ, B64, BH, BZ2, BZA, CAB, CPIO, DEB, ENC, GCA, GZ, GZA, HA, JAR, LHA, LIB, LZH, MBF, MIM, PAK, PK3, RAR, RPM, TAR, TAZ, TBZ,
TGZ, TZ, UUE, WAR, XXE, YZ1, Z, ZIP, ZOO.

 It is 100% free.

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RATING: EXCELLENT

However, it is still extremely popular due to the diffusion of the archives in this format.

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RATING: VERY GOOD