httpZip 5.0.0.0414 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software is included in Internet & Network Tools.
The following versions: 5.0, 4.2 and 3.9 are the most frequently downloaded ones by the program users. The program's installer files are commonly found as HTTPZip.exe or zip_dialog.exe etc. The actual developer of the program is Port80 Software. We recommend checking the downloaded files with any free antivirus.
From the developer:
Shrink Static & Dynamic Files on IIS 6 & 7.x for Faster Page Loads & Bandwidth Savings.
Reducing file size is the best way to speed your Web content. HTTP compression allows content to be served up to 50 times faster while reducing bandwidth costs.
Web content compressed to as little as 2% of original size with flawless decompression ensured by real-time browser compatibility checking.
You may want to check out more software, such as ZipEnable, which might be related to httpZip.