Unlike WinRAR, which famously "asks" for a license forever, 7-Zip is completely free for personal and commercial use under the GNU LGPL license.
It can unpack almost anything, from standard ZIPs and RARs to more "exotic" formats like ISO, TAR, and MSI. The Secret Power: LZMA programma 7 zip skachat besplatno
It introduced the 7z format , which often compresses files 30–70% better than the standard ZIP format. Unlike WinRAR, which famously "asks" for a license