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.
Seems like they both would be replaced soon - on ST site in section 'STM32 Software Development Tools' they both - TrueSTUDIO and SW4STM32 - are marked as NRND.