WinZip is a popular software that is able to compress file or files in order to make them smaller in size or keeping them in a single file.
First time was released in 1991 and still has a high usage these days.
Is capable of creating or unpacking/open ZIP archives, but also supports different other formats (RAR, 7Z, Gzip etc.). Files can be protected with passwords or even add watermarks.
This tool is designed mainly to reduce space on your hard drive or to send many files in a compressed format (this results in smaller size) through email, social networks, USB, DVD and more.