7-Zip is a popular, free file archiving tool capable of handling ZIP files. 7-Zip is open-source software, so anyone can inspect the program's source code and look for potential flaws. CAM UnZip and jZip are two more file compression programs available for free.
7-Zip's file compression tool uses its own archive format, 7z, but is capable of reading and writing several other formats, such as ZIP, TAR and WIM. 7-Zip was released in July of 1999 and has been continually updated since then.
CAM UnZip is another good ZIP file utility and can create, view, list and unzip ZIP files. Cam UnZip is distributed for free and includes support for password-protected ZIP files. JZip is a free WinZip alternative with broader file type support than CAM UnZip, and is able to work with ZIP, TAR, GZIP and 7-Zip files. According to jZip's website, the program is based on proven and reliable 7-Zip archiving technology by Igor Pavlov. The website specifically addresses the reliability of the tool and claims to be a powerful and reliable compression utility. JZip emphasizes its ease of use and is equipped with a simple interface to make it easier for less-experienced users to use the compression tool.