You can get more information from the ac6-tools website and download (registration required) various documents highlighting:
System Workbench for STM32
This forum is meant to discuss problems and suggestions on System Workbench for STM32.
Solving "ADC Reading 7FF (counts) After Power Cycle" Bug with STM32L0 by sclokey
This low-traffic forum will receive announcements from Ac6 about the OpenSTM32 site or Ac6 STM32 development tools.
System Workbench for STM32 v2.9.1 release by christelle.burguera