UnZip 3.0 (May 1990) became the first public release by Info-ZIP group. In Spring 1990, Info-ZIP was formed as a mailing list on SIMTEL20, and released UnZip 2.0a (December 1989) was released by Carl Mascott and John Cowan. It included support for the 'unimploding' (method 6) introduced by PKZIP 1.01. UnZip 2.0 (September 1989) was released by Samuel M. UnZip 1.0 (March 1989) was released by Samuel M.

ZipSplit splits a ZIP archive into sections for separate disks or downloads.

ZipNote allows the modification of comment fields in ZIP archives.

ZipCloak adds or removes password encryption from file in a ZIP archive.

The Zip package includes three additional utilities:

ZipInfo outputs, in a variety of formats, information about ZIP files and their contents.

UnZipSFX is software to make a ZIP file into an executable self-extracting archive.

fUnZip extracts a file in a ZIP or gzip file directly to output from archives or other piped input.

The UnZip package also includes three additional utilities: Many Info-ZIP programmers have also been involved in other projects closely related to the DEFLATE compression algorithm, such as the PNG image format and the zlib software library. In addition to the Info-ZIP releases themselves, parts of Info-ZIP, including zlib, have been used in numerous other file archivers and other programs.

The 'zip' and 'unzip' programs included with most Linux and Unix distributions are Info-ZIP's Zip and UnZip. The UnZip web page describes UnZip as 'The Third Most Portable Program in the World', surpassed by Hello World, C-Kermit, and possibly the Linux kernel. Info-ZIP's Zip and UnZip have been ported to dozens of computing platforms. It consists of 4 separately-installable packages: the Zip and UnZip command-line utilities and WiZ and MacZip, which are graphical user interfaces for archiving programs in Microsoft Windows and classic Mac OS, respectively. Info-ZIP is a set of open-source software to handle ZIP archives.

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