ZipItFree is a free WinZip alternative that makes use of advanced Black Hole Super 5X Compression technology to compress your files as much as possible.
Apart from anything else, the best thing about ZipItFree is that it is completely free - no annoying registrations or fees to pay. That said, the installation process is very aggressive, with ZipItFree offering you bunches of extra software and changing the way it is presented in the hope that you'll slip up and install it. The program is fully functional with Vista and Windows 7, although the interface isn’t quite up to speed with similarly modern programs.
The key point of ZipItFree, however, is the way it compresses files using what the developers call the Black Hole method, which provides very high compression ratios and ultra fast decompression. This is so efficient, in fact, that ZipItFree is a serious rival to the giants of the file compression world, like WinZip and WinRAR.
The other major selling point is what they call the ZipV2 encryption algorithm which they describe as "by far the most secure encryption for archiving (hundreds of times more secure than even the leading AES encryption)". How secure this format is is debatable, but the fact is that it's one of the less utilized compression ratios that should mean it's less liable to attack.
Apart from the fact that ZipItFree handles multiple formats with ease, you can also leave comments on your archives describing what the archive contains so you don't have to go to the hassle of unzipping it all to look inside. If you can overlook the ugly packaging, ZipItFree is a file compressor to be reckoned with.
For a free and powerful alternative to WinZIP and WinRAR, ZipItFree is one of the most impressive efforts out there.