WinGZip is an small tool for working with files in gzip format (usually it's files with .GZ or .TGZ extensions). It gives you the possibility to compress any file into gzip format, decompress and test the integrity of already gzipped files.
The gzip (GNU zip) is an command line driven compression utility with excellent compression, free from patented algorithms and currently very popular on the Internet. gzip is not archiving utility, i.e. its can't roll up several files together. It simply compress the specified file.