Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
When i choose the STM32F407VETX as target MCU the MCU definition dialog and the linker script define this part as having 128 KB RAM but to my knowledge this part has 192 KB RAM (and some CCRAM)