You can browse the SMS-Soft Firmware Database which indexes standard files for factory ECUs.
If you are looking to increase power, improve throttle response, or remove catalytic converter monitoring (Euro-2 transition), purchase dynamic files from recognized calibrators: proshivki ebu bosh vaz skachat
Widely used on Lada Priora, Kalina, and Niva. Highly customizable. You can browse the SMS-Soft Firmware Database which