Thank you for using our software library. To download the product you want, you should use the link provided below and proceed to the developer's website as this was the only legal source to get Quackle. We cannot confirm if there is a free download of this software available.
However, we must warn you that downloading Quackle from an external source releases FDM Lib from any responsibility. Please carefully check your downloads with antivirus software. FDM Lib shall include an option for direct download from developers, should it become available in the future.
Download from people.csail.mit.edu