While some professional tools require expensive subscriptions, several free or budget-friendly options are popular among enthusiasts:
A legacy tool often available in free archives that supports older vehicle models from the early 2000s. Immo Off Software Free Download
Dedicated small utilities for Volkswagen Audi Group (VAG) vehicles, specifically for EDC15, EDC16, and some EDC17 ECUs. How to Use Immo Off Software specifically for EDC15
Performing an Immo Off is a multi-step process that requires hardware and software working together: IMMO OFF How & Why? | CaracalTech Immo Off Software Free Download
One of the most widely used tools for processing ECU dumps (files) to remove immobilizer constraints.