The 3.15.0121 version of QRCodePro for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. You can run QRCodePro on Mac OS X 10.7 or later.
This free Mac app is an intellectual property of SUN ZHI FENG. The most popular versions among the application users are 3.1 and 1.1. The software lies within Developer Tools, more precisely Webmaster Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
QRCodePro is an application which allows you to convert any content to QR code. The application has a interactive and customizable interface. You can custom: Size, Border width, Border color, Background color, Module color, etc. This application is very easy to use by any user.
You may want to check out more Mac applications, such as VirtualHostX, CSS3 Menu or LiveReload, which might be similar to QRCodePro.