Docs
Community
Using STM32CubeMX and PlatformIO
GitHub
github.com/jbaumann/pio_and_stm32cubeide
github.com/ussserrr/stm32pio, Automate managing of STM32CubeMX + PlatformIO projects
github.com/stm32duino/Arduino_Core_STM32, STM32 core support for Arduino
Questions
How to create the STM32CubeMx project?
Tutorials
Getting started with STM32 and things you need to be aware of, January 5, 2020