STMicroelectronics'  families of legacy microcontrollers (ST6, ST7, ST9, STR7, STR9, uPSD etc) are supported by a complete range of software tools. This complete line includes products from ST and third-party solutions.

It encompasses traditional integrated development environments (IDEs) with C/C++ compilers and debuggers from major 3rd-parties (free versions up to 32KB of code, depending on partner), complemented by ST's in-house tools.