CircleIcons 4.0.1 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software is included in Design & Photo Tools. The actual developer of this software for Mac is Bayhoff Software. We recommend checking the downloaded files with any free antivirus.
From the developer:
CircleIcons helps you easily create a “circle icon” for your iPhone, iPad, Mac, or WatchKit app. First, you need to create a template image in your favorite image editor and make a new Circle Icons document. Next, you can choose a top gradient color, a bottom gradient, and a circle color. Then, you need to drop the template image into the respective image and export the icon.
You may want to check out more Mac applications, such as Cuadro or Resize Now, which might be related to CircleIcons.