Dreamset has been the #1 free alternative for over a decade. It supports:
: The full version requires an activation key. Pricing varies by configuration (e.g., base configurations for Indesit or Candy start around 4000 RUB). Free Updates sky prog programmer free
Assuming a common CH341A-style Sky Prog programmer and a SPI flash chip target. Dreamset has been the #1 free alternative for over a decade