The most commonly used and popular compression/decompression software nowadays is undoubtedly WinRAR. It compresses files to a small size, supports multiple file formats, has a user-friendly interface, and offers the convenience of a right-click menu, making it very popular among netizens. The only regret is that WinRAR, like WinZip, is shareware. If there were a more powerful compression software than WinRAR available for free, I believe you would accept it just like the webmaster would, right?