Download of NCConverter 1.2 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is TommyWu.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. NCConverter for Mac lies within Design & Photo Tools, more precisely Converters.
From the developer:
NCConverter is an application that helps you convert NC files in one click. The conversion is performed locally so there no need for file upload. The utility preserves sound quality and supports batch operation. All you need to do is import the NC files and enable the conversion.
You may want to check out more Mac applications, such as Colorize your photos, dcm2niigui or FolderIconCreator, which might be similar to NCConverter.