inZip, the original and most popular compression utility for Windows, is a powerful and easy-to-use tool that quickly zips and unzips your files to conserve disk space and greatly reduce e-mail transmission time. WinZip 11.1 is available as Standard or Pro.

WinZip 11.1 is an updated version of our most recent major release—WinZip 11.0—that supports Windows Vista™.

WinZip 11.1 offers a thumbnail image view and automatic compression
selection, plus improved compression for audio files (WAV) and the
ability to open .BZ2 and .RAR files.

WinZip 11.1 Pro adds expanded data backup functionality and includes a
new internal image viewer that allows you to browse through multiple
images within the Zip file.