This is the official, free-to-use, all-in-one development tool from STMicroelectronics. It is based on Eclipse and includes the GCC compiler, offering professional-grade features without any license fees.
Searching for and installing cracked software (or using unauthorized key generators) carries several risks: keil stm32 skachat c kliuchom
Executables from unofficial sources often contain malware or trojans that can compromise your workstation. This is the official