7-Zip

This is just a sweet, simple little Windows archive utility. Most people can use it instead of WinZip, as most people don't use the advanced features of WinZip.

So these days, you almost don't need to get a zip utility. Regardless of if you're using Windows, Mac or Linux - your OS comes with zip and unzip functionality built in. But this one adds one very valuable feature: AES 256 encryption. With a simple "encrypt" option, you can make your dot zip file encrypted with a very secure encryption algorithm making the file useless to anyone who doesn't know the password. But please, if you're going to bother encrypting something - choose long and complicated passwords.