Downloading Zipwise 2005 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this Mac application is Brian Dunning. We recommend checking the downloaded files with any free antivirus.
From the developer:
Get the raw data now. This is the actual data from the U.S. Postal Service, but for a tiny fraction of the cost. Includes data in the following formats: Excel format (.xls) Text file (.