UltimateZip is a free alternative to WinRAR that can both zip and unzip files. The tool integrates directly in Windows, encrypts files and works with a wide range of antivirus programs. UltimateZip compresses and sends files in e-mails in just one step, supporting the following formats: .zip, .rar, .ace, .bh, .cab, .jar, .lha, .gzip, .tar, .bz2, .arc, .arj, .xxe, .uue.