A completely free, open-source parametric 3D modeler.

This era marked the peak of the cat-and-mouse game between Autodesk and crackers. Autodesk implemented increasingly complex "Phone Home" activation sequences, while X-Force countered with "Memory Patching." Users often had to disable their antivirus and disconnect from the internet to run the keygen—a process that felt like a digital heist and became a rite of passage for many tech-savvy designers of that era. A Legacy of Modern Licensing

The user inputs a generic serial number during installation.