7-Zip is a free zip / unzip file archiver with a high compression ratio.
Read More »7-Zip Portable 9.20 – freeware
The popular 7-Zip packaged as a portable app.
Read More »#7Z v0.9.1 – freeware
#7Z is a 7-Zip GUI for Windows, which attempts to simplify data compression and backup.
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DigitByte Software for Windows, Mac, iPhone, iPad, iPod – free download