Download of Fatsondo 2.0 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. We recommend checking the downloaded files with any free antivirus. Fatsondo for Mac relates to Audio & Video Tools.
From the developer:
Fatsondo is one of very few VST instruments (and AudioUnits), which has been tailored made for the creation of fat sounds. And it has a built-in chorus, flanger, stereo delay, comes with 64 factory patches and a 17 page manual (Adobe Acrobat). Listen to the MP3 files at the bottom of this page.