Haozip is a free alternative for popular softwares like Winzip and Winrar. It can uncompress around 50 different formats including .ZIP and .RAR
Besides extracting and compressing archive files, Haozip has several useful functions, like checking an archive for errors and repairing damaged archives. It can even calculate MD5, Sha1 and CRC32 checksum for files. This can be useful to check the integrity of files. The main window of Haozip can also be used to browse your computer for archives you may wish to open or to create new archives.